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Yu L, Xia A, Hao Y, Li W, He X, Xing C, Shang Z, Zhang Y. COF-SiO 2@Fe 3O 4 Composite for Magnetic Solid-Phase Extraction of Pyrethroid Pesticides in Vegetables. Molecules 2024; 29:2311. [PMID: 38792172 PMCID: PMC11123868 DOI: 10.3390/molecules29102311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 04/19/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
Pyrethroid pesticides (PYRs) have found widespread application in agriculture for the protection of fruit and vegetable crops. Nonetheless, excessive usage or improper application may allow the residues to exceed the safe limits and pose a threat to consumer safety. Thus, there is an urgent need to develop efficient technologies for the elimination or trace detection of PYRs from vegetables. Here, a simple and efficient magnetic solid-phase extraction (MSPE) strategy was developed for the simultaneous purification and enrichment of five PYRs in vegetables, employing the magnetic covalent organic framework nanomaterial COF-SiO2@Fe3O4 as an adsorbent. COF-SiO2@Fe3O4 was prepared by a straightforward solvothermal method, using Fe3O4 as a magnetic core and benzidine and 3,3,5,5-tetraaldehyde biphenyl as the two building units. COF-SiO2@Fe3O4 could effectively capture the targeted PYRs by virtue of its abundant π-electron system and hydroxyl groups. The impact of various experimental parameters on the extraction efficiency was investigated to optimize the MSPE conditions, including the adsorbent amount, extraction time, elution solvent type and elution time. Subsequently, method validation was conducted under the optimal conditions in conjunction with gas chromatography-mass spectrometry (GC-MS). Within the range of 5.00-100 μg·kg-1 (1.00-100 μg·kg-1 for bifenthrin and 2.5-100 μg·kg-1 for fenpropathrin), the five PYRs exhibited a strong linear relationship, with determination coefficients ranging from 0.9990 to 0.9997. The limits of detection (LODs) were 0.3-1.5 μg·kg-1, and the limits of quantification (LOQs) were 0.9-4.5 μg·kg-1. The recoveries were 80.2-116.7% with relative standard deviations (RSDs) below 7.0%. Finally, COF-SiO2@Fe3O4, NH2-SiO2@Fe3O4 and Fe3O4 were compared as MSPE adsorbents for PYRs. The results indicated that COF-SiO2@Fe3O4 was an efficient and rapid selective adsorbent for PYRs. This method holds promise for the determination of PYRs in real samples.
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Affiliation(s)
- Ling Yu
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, China; (A.X.); (Y.H.); (W.L.); (X.H.); (Z.S.); (Y.Z.)
- Functional Polymer Materials R&D and Engineering Application Technology Innovation Center of Hebei, Xingtai 054001, China
| | - Aiqing Xia
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, China; (A.X.); (Y.H.); (W.L.); (X.H.); (Z.S.); (Y.Z.)
| | - Yongchao Hao
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, China; (A.X.); (Y.H.); (W.L.); (X.H.); (Z.S.); (Y.Z.)
| | - Weitao Li
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, China; (A.X.); (Y.H.); (W.L.); (X.H.); (Z.S.); (Y.Z.)
| | - Xu He
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, China; (A.X.); (Y.H.); (W.L.); (X.H.); (Z.S.); (Y.Z.)
| | - Cuijuan Xing
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, China; (A.X.); (Y.H.); (W.L.); (X.H.); (Z.S.); (Y.Z.)
| | - Zan Shang
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, China; (A.X.); (Y.H.); (W.L.); (X.H.); (Z.S.); (Y.Z.)
| | - Yiwei Zhang
- College of Chemistry and Chemical Engineering, Xingtai University, Xingtai 054001, China; (A.X.); (Y.H.); (W.L.); (X.H.); (Z.S.); (Y.Z.)
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Della Posta S, Gallo V, Gentili A, Gherardi M, De Gara L, Fanali C. Low transition temperature mixture-based extraction of 14 pesticides from tomato samples and their high-performance liquid chromatography-tandem mass spectrometry analysis. J Chromatogr A 2024; 1717:464690. [PMID: 38309188 DOI: 10.1016/j.chroma.2024.464690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/26/2024] [Accepted: 01/27/2024] [Indexed: 02/05/2024]
Abstract
The extensive use of pesticides to control pest infestations has led to the development of analytical methods to determine pesticide residues in food matrices to prevent food exposure. However, most developed analytical methods do not consider impact on the environment in terms of the toxicity of the chemicals used and the amount of waste produced. An environmentally-friendly method, based on a miniaturized matrix solid-phase dispersion followed by high-performance liquid chromatography-tandem mass spectrometry, for the analysis of fourteen pesticides in tomatoes, was exploited. For the recovery of pesticides from tomato samples, a low transition temperature mixture (LTTM), containing choline chloride and sesamol 1:3 molar ratio, was employed. Extraction parameters like sample-to-dispersant ratio, extraction solvent volume and LTTM volume were optimized through a Box-Behnken design. The 1:4 sample-to-dispersant ratio, 900 µL of ethanol as extraction solvent and 50 µL of LTTM ensured the best result considering the pesticides' peak areas. The optimized analytical method was validated obtaining the following results: linearity range was between LOQ and 5 mg kg-1 with a minimum R2 of 0.9944 for tebufenozide, values in the range of 0.001-0.023 and 0.004-0.076 mg kg-1 were obtained for LOD and LOQ respectively, while peak areas intra-day and inter-day repeatability were maximum of 10.19 and 9.15 %, respectively. The analytical method was then applied to real samples studying whole, pulp and peel tomato pool. The analysis of whole and tomato pulp revealed the presence of seven and eight of the fourteen investigated pesticides, respectively. However, their concentration was lower than the limit of quantification. In tomato peel, five pesticides, namely dimethomorph, methoxyfenozide, pyraclostrobin, pyriproxyfen, and spiromesifen were quantified and their concentrations were below maximum residue levels.
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Affiliation(s)
- Susanna Della Posta
- Department of Science and Technology for Sustainable Development and One Health, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, Rome 00128, Italy
| | - Valeria Gallo
- Department of Science and Technology for Sustainable Development and One Health, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, Rome 00128, Italy
| | - Alessandra Gentili
- Department of Chemistry "Sapienza" University of Rome, P.le Aldo Moro 5, Rome 00185, Italy
| | - Monica Gherardi
- Chemical Risk Laboratory, INAIL- DiMEILA, Monte Porzio Catone Research Center, Rome
| | - Laura De Gara
- Department of Science and Technology for Sustainable Development and One Health, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, Rome 00128, Italy
| | - Chiara Fanali
- Department of Science and Technology for Sustainable Development and One Health, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, Rome 00128, Italy.
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Williams ML, Olomukoro AA, Emmons RV, Godage NH, Gionfriddo E. Matrix effects demystified: Strategies for resolving challenges in analytical separations of complex samples. J Sep Sci 2023; 46:e2300571. [PMID: 37897324 DOI: 10.1002/jssc.202300571] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 09/22/2023] [Accepted: 09/29/2023] [Indexed: 10/30/2023]
Abstract
Matrix effects can significantly impede the accuracy, sensitivity, and reliability of separation techniques presenting a formidable challenge to the analytical process. It is crucial to address matrix effects to achieve accurate and precise measurements in complex matrices. The multifaceted nature of matrix effects which can be influenced by factors such as target analyte, sample preparation protocol, composition, and choice of instrument necessitates a pragmatic approach when analyzing complex matrices. This review aims to highlight common challenges associated with matrix effects throughout the entire analytical process with emphasis on gas chromatography-mass spectrometry, liquid chromatography-mass spectrometry, and sample preparation techniques. These techniques are susceptible to matrix effects that could lead to ion suppression/enhancement or impact the analyte signal at various stages of the analytical workflow. The assessment, quantification, and mitigation of matrix effects are necessary in developing any analytical method. Strategies can be implemented to reduce or eliminate the matrix effect by changing the type of ionization, improving extraction and clean-up methods, optimization of chromatography conditions, and corrective calibration methods. While development of an effective strategy to completely mitigate matrix effects remains elusive, an integrated approach that combines sample preparation, analytical extraction, and effective instrumental analysis remains the most promising avenue for identifying and resolving matrix effects.
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Affiliation(s)
- Madison L Williams
- Department of Chemistry and Biochemistry, The University of Toledo, Toledo, Ohio, USA
- Dr. Nina McClelland Laboratory for Water Chemistry and Environmental Analysis, The University of Toledo, Toledo, Ohio, USA
| | - Aghogho Abigail Olomukoro
- Department of Chemistry and Biochemistry, The University of Toledo, Toledo, Ohio, USA
- Dr. Nina McClelland Laboratory for Water Chemistry and Environmental Analysis, The University of Toledo, Toledo, Ohio, USA
| | - Ronald V Emmons
- Department of Chemistry and Biochemistry, The University of Toledo, Toledo, Ohio, USA
- Dr. Nina McClelland Laboratory for Water Chemistry and Environmental Analysis, The University of Toledo, Toledo, Ohio, USA
| | - Nipunika H Godage
- Department of Chemistry and Biochemistry, The University of Toledo, Toledo, Ohio, USA
- Dr. Nina McClelland Laboratory for Water Chemistry and Environmental Analysis, The University of Toledo, Toledo, Ohio, USA
| | - Emanuela Gionfriddo
- Department of Chemistry and Biochemistry, The University of Toledo, Toledo, Ohio, USA
- Dr. Nina McClelland Laboratory for Water Chemistry and Environmental Analysis, The University of Toledo, Toledo, Ohio, USA
- School of Green Chemistry and Engineering, The University of Toledo, Toledo, Ohio, USA
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Li Y, He M, Chen B, Hu B. A Schiff base networks coated stir bar for sorptive extraction of pyrethroid pesticide residues in tobacco. J Chromatogr A 2023; 1689:463759. [PMID: 36599193 DOI: 10.1016/j.chroma.2022.463759] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 12/25/2022] [Accepted: 12/26/2022] [Indexed: 12/29/2022]
Abstract
Schiff base networks (SNWs) were introduced as a new stir bar coating, and a method of SNWs- coated stir bar sorptive extraction (SBSE) coupled to high performance liquid chromatography-ultraviolet detector (HPLC-UV) was developed for determination of pyrethroid pesticide residues in tobacco. The prepared amorphous SNWs polymer from melamine and 3,5-dihydroxybenzaldehyde riches in triazine rings, hydroxyl groups and amino groups, and the SNWs/polydimethylsiloxane (PDMS) stir bar prepared by sol-gel method can extract weakly polar pyrethroid pesticides through hydrophobic, π-π and hydrogen bonding. The SNWs/PDMS stir bar exhibited high extraction efficiency toward pyrethroid pesticides (70-76%) and good mechanical stability with reused time more than 50 times. Under the optimal experimental conditions, the limits of detection were 0.20 - 0.66 µg/L with relative standard deviation varying in the range of 2.3-8.2%, which meets the requirements of trace analysis of pesticide residues in the tobacco industry. The method was applied to the determination of six pyrethroid pesticides in cigarette samples, and the recovery for the spiked samples ranged from 82 to 117%, showing a great applicability for the analysis of pesticide residues in real samples with a complex sample matrix.
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Affiliation(s)
- Yi Li
- Department of Chemistry, Wuhan University, Wuhan 430072, P. R. China
| | - Man He
- Department of Chemistry, Wuhan University, Wuhan 430072, P. R. China
| | - Beibei Chen
- Department of Chemistry, Wuhan University, Wuhan 430072, P. R. China.
| | - Bin Hu
- Department of Chemistry, Wuhan University, Wuhan 430072, P. R. China
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5
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Wang P, Zhang Q, Liu D, Zhou Z, Wang P. Fluorometric assay of cyanophoric pyrethroids based on benzothiazole modified carbon quantum dots. NEW J CHEM 2023. [DOI: 10.1039/d3nj00465a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
A fluorometric assay based on benzothiazole carbon quantum dots (benzothiazole-CDs) was developed for the determination of cyanophoric pyrethroids (CPs, e.g., cypermethrin, deltamethrin and fenpropathrin).
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Pesticides Identification and Sustainable Viticulture Practices to Reduce Their Use: An Overview. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238205. [PMID: 36500297 PMCID: PMC9735622 DOI: 10.3390/molecules27238205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/18/2022] [Accepted: 11/21/2022] [Indexed: 11/27/2022]
Abstract
The use of pesticides is a necessary practice in the modern era. Therefore, it is impossible to ignore the pesticide market, which has developed into one of the most lucrative in the world. Nowadays, humans are subjected to many potential risks, and significant amounts of toxic compounds enter their bodies through food, drink, and the air itself. Identification and quantification of these hazardous compounds is crucial for the sustainable development of an increasing world population which poses high climatic and political constraints on agricultural production systems. The maximum residue limits for pesticides have been regulated by the Codex Alimentarius Commission and European Union to protect human health. In this review, we have summarized and explained the analytical methods for pesticide extraction and determination. Also, sustainable viticulture practices like organic vineyards, tillage, biopesticides, nanobiopesticides, and precision viticulture are briefly discussed. These new techniques allow wine growers to be more profitable and efficient, while contributing to the reduction of pests and increasing the quality of wines.
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7
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Cao H, Chen Z, Kong Y, Wei Z, Ye T, Yuan M, Yu J, Wu X, Hao L, Yin F, Xu F. Dispersive Liquid‐Liquid Microextraction (DLLME) Based on Solidification of Switchable Hydrophilicity Solvent Coupled with High‐Performance Liquid Chromatography (HPLC) with Photodiode Array (PDA) Detection for the Determination of Pyrethroid Pesticides in Grains. ANAL LETT 2022. [DOI: 10.1080/00032719.2022.2141768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hui Cao
- School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai, China
| | - Zixin Chen
- School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai, China
| | - Yanan Kong
- School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai, China
| | - Ziqi Wei
- School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai, China
| | - Tai Ye
- School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai, China
| | - Min Yuan
- School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai, China
| | - Jinsong Yu
- School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai, China
| | - Xiuxiu Wu
- School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai, China
| | - Liling Hao
- School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai, China
| | - Fengqin Yin
- School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai, China
| | - Fei Xu
- School of Health Science and Engineering, Shanghai Engineering Research Center of Food Rapid Detection, University of Shanghai for Science and Technology, Shanghai, China
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Wahab S, Muzammil K, Nasir N, Khan MS, Ahmad MF, Khalid M, Ahmad W, Dawria A, Reddy LKV, Busayli AM. Advancement and New Trends in Analysis of Pesticide Residues in Food: A Comprehensive Review. PLANTS (BASEL, SWITZERLAND) 2022; 11:1106. [PMID: 35567107 PMCID: PMC9105315 DOI: 10.3390/plants11091106] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 04/05/2022] [Accepted: 04/16/2022] [Indexed: 05/03/2023]
Abstract
Food safety is a rising challenge worldwide due to the expanding population and the need to produce food to feed the growing population. At the same time, pesticide residues found in high concentrations in fresh agriculture pose a significant threat to food safety. Presently, crop output is being increased by applying herbicides, fungicides, insecticides, pesticides, fertilizers, nematicides, and soil amendments. A combination of factors, including bioaccumulation, widespread usage, selective toxicity, and stability, make pesticides among the most toxic compounds polluting the environment. They are especially harmful in vegetables and fruits because people are exposed to them. Thus, it is critical to monitor pesticide levels in fruits and vegetables using all analytical techniques available. Any evaluation of the condition of pesticide contamination in fruits and vegetables necessitates knowledge of maximum residue levels (MRLs). We set out the problems in determining various types of pesticides in vegetables and fruits, including the complexity and the diversity of matrices in biological materials. This review examines the different analytical techniques to determine the target analytes that must be isolated before final consumption. Many processes involved determining pesticide residues in fruits and vegetables and their advantages and disadvantages have been discussed with recommendations. Furthermore, MRLs of target pesticide residues in fruit and vegetable samples are discussed in the context of data from the literature. The review also examines MRLs' impact on the international trade of fruits and vegetables. Accurate, sensitive, and robust analytical procedures are critical to ensuring that pesticide levels in food products are effectively regulated. Despite advances in detection technology, effective sample preparation procedures for pesticide residue measurement in cereals and feedstuffs are still needed. In addition, these methods must be compatible with current analytical techniques. Multi-residue approaches that cover a wide range of pesticides are desired, even though pesticides' diverse natures, classes, and physio-chemical characteristics make such methods challenging to assemble. This review will be valuable to food analysts and regulatory authorities to monitor the quality and safety of fresh food products.
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Affiliation(s)
- Shadma Wahab
- Department of Pharmacognosy, College of Pharmacy, King Khalid University, Abha 61421, Saudi Arabia
| | - Khursheed Muzammil
- Department of Public Health, College of Applied Medical Sciences, Khamis Mushait, King Khalid University, Abha 61412, Saudi Arabia; (K.M.); (M.S.K.)
| | - Nazim Nasir
- Department of Basic Medical Sciences, College of Applied Medical Sciences, Khamis Mushait, King Khalid University, Abha 61412, Saudi Arabia;
| | - Mohammad Suhail Khan
- Department of Public Health, College of Applied Medical Sciences, Khamis Mushait, King Khalid University, Abha 61412, Saudi Arabia; (K.M.); (M.S.K.)
| | - Md Faruque Ahmad
- Department of Clinical Nutrition, College of Applied Medical Sciences, Jazan University, Jazan 45142, Saudi Arabia; (M.F.A.); (A.M.B.)
| | - Mohammad Khalid
- Department of Pharmacognosy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia;
| | - Wasim Ahmad
- Department of Pharmacy, Mohammed Al-Mana College for Medical Sciences, Safaa, Dammam 34222, Saudi Arabia;
| | - Adam Dawria
- Department of Public Health, College of Health Sciences, Khamis Mushait Campus, King Khalid University, Abha 61412, Saudi Arabia;
| | | | - Abdulrahman Mohammed Busayli
- Department of Clinical Nutrition, College of Applied Medical Sciences, Jazan University, Jazan 45142, Saudi Arabia; (M.F.A.); (A.M.B.)
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Sayed S, Soliman MM, Al-Otaibi S, Hassan MM, Elarrnaouty SA, Abozeid SM, El-Shehawi AM. Toxicity, Deterrent and Repellent Activities of Four Essential Oils on Aphis punicae (Hemiptera: Aphididae). PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11030463. [PMID: 35161443 PMCID: PMC8839614 DOI: 10.3390/plants11030463] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 01/31/2022] [Accepted: 02/04/2022] [Indexed: 05/26/2023]
Abstract
Chemical insecticides have many harmful effects, including as foodborne residues and environmental contaminants, as well as side effects on natural enemies and serious risks for human health. The use of plant-derived essential oils (EOs) as effective bio-agents has become an essential component of integrated pest management. In this study, the contact toxicity, deterrent, and repellent activities were evaluated for essential oils obtained from Mentha piperita, Mentha longifolia, Salvia officinalis, and Salvia rosmarinus, grown at high altitudes in the Taif region, KSA, on Aphis punicae. Furthermore, the toxicity of these EOs against the predator Coccinella undecimpunctata was estimated. A total of 17, 14, 16, and 26 compounds were identified in the EOs of M. piperita, M. longifolia, S. officinalis, and S. rosmarinus, respectively. They showed a variation in the major compounds: M. piperita (Carvone, 61.16%), M. longifolia (Pulegone, 48.6%), S. officinalis (Eucalyptol, 33.52%), and S. rosmarinus (α-pinene, 36.65%). A contact toxicity test on A. punicae imago and C. undecimpunctata larvae showed that LC50 were approximately four-fold greater for all tested EOs towards aphids compared to towards the predator, while the two species of Salvia sp. were more effective than the other two species of Mentha sp. The LC50 values on A. punicae ranged from 1.57 to 2.97 µg/mL, while on C. undecimpunctata larvae, they ranged from 5.96 to 10.33 µg/mL. Furthermore, the EOs of two species of Salvia sp. showed excellent repellence and deterrence against A. punicae. In conclusion, the tested EOs, especially those from Salvia sp., have been shown to be promising natural aphicides, repellent, and deterrent against A. punicae, and they are safe for important insect predators.
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Affiliation(s)
- Samy Sayed
- Department of Science and Technology, University College-Ranyah, Taif University, Taif 21944, Saudi Arabia
| | - Mohamed Mohamed Soliman
- Clinical Laboratory Sciences Department, Turabah University College, Taif University, Taif 21995, Saudi Arabia;
| | - Saad Al-Otaibi
- Department of Biotechnology, College of Science, Taif University, Taif 21944, Saudi Arabia; (S.A.-O.); (A.M.E.-S.)
| | - Mohamed M. Hassan
- Department of Biology, College of Science, Taif University, Taif 21944, Saudi Arabia;
| | - Sayed-Ashraf Elarrnaouty
- Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University, Giza 12613, Egypt;
| | - Samia M. Abozeid
- Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza 12618, Egypt;
| | - Ahmed M. El-Shehawi
- Department of Biotechnology, College of Science, Taif University, Taif 21944, Saudi Arabia; (S.A.-O.); (A.M.E.-S.)
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10
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Dowlatshah S, Ramos-Payán M, Saraji M. A microchip device based liquid-liquid-solid microextraction for the determination of permethrin and cypermethrin in water samples. Talanta 2021; 235:122731. [PMID: 34517599 DOI: 10.1016/j.talanta.2021.122731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/21/2021] [Accepted: 07/22/2021] [Indexed: 11/29/2022]
Abstract
In this work, for the first time, a microchip device integrating liquid-liquid-solid phase microextraction is presented. As a novel approach to microchip systems, liquid-liquid-solid microextraction was performed in a sandwiched microchip device. The microchip device consisted of three poly(methyl methacrylate) layers along with a double "Y"-shaped microchannel. As the stationary phase, polyacrylonitrile-C18 was synthesized and immobilized in the upper channel, while the beneath channel was used as a reservoir for the stagnant volume ratio of sample-to-extraction solvent phase. In this way, analytes were extracted from an aqueous sample through an organic phase into the stationary phase. The analytes were finally desorbed with a minimum amount of acetonitrile as the desorption solvent. Permethrin and cypermethrin were selected as the model analytes for extraction and subsequent analysis by gas chromatography-flame ionization detection. Under optimum conditions (extraction solvent; n-hexane, sample -to-extraction solvent volume ratio; 2:1, extraction time; 20 min, desorption solvent; acetonitrile, desorption volume; 200 μL, and desorption time; 15 min) detection limits were 3.5 and 6.0 ng mL-1 for permethrin and cypermethrin, respectively. Relative standard deviations for intra- and inter-day reproducibility were below 8.3%. Device-to-device precision was in the range of 8.1-9.6%. The proposed microchip device was successfully applied to determine permethrin and cypermethrin in water samples with recoveries in the range of 73-96%.
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Affiliation(s)
- Samira Dowlatshah
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran; Department of Analytical Chemistry, Faculty of Chemistry, Universidad de Sevilla, c/Prof. García González, s/n, 41012, Seville, Spain
| | - María Ramos-Payán
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad de Sevilla, c/Prof. García González, s/n, 41012, Seville, Spain
| | - Mohammad Saraji
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
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Belarbi S, Vivier M, Zaghouani W, De Sloovere A, Agasse V, Cardinael P. Comparison of Different d-SPE Sorbent Performances Based on Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) Methodology for Multiresidue Pesticide Analyses in Rapeseeds. Molecules 2021; 26:6727. [PMID: 34771135 PMCID: PMC8588138 DOI: 10.3390/molecules26216727] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/02/2021] [Accepted: 11/03/2021] [Indexed: 11/24/2022] Open
Abstract
Pesticide extraction in rapeseed samples remains a great analytical challenge due to the complexity of the matrix, which contains proteins, fatty acids, high amounts of triglycerides and cellulosic fibers. An HPLC-MS/MS method was developed for the quantification of 179 pesticides in rapeseeds. The performances of the quick, easy, cheap, effective, rugged, and safe (QuEChERS) method were evaluated using different dispersive solid-phase extraction (d-SPE) sorbents containing common octadecylsilane silica/primary-secondary amine adsorbent (PSA/C18) and new commercialized d-SPE materials dedicated to fatty matrices (Z-Sep, Z-Sep+, and EMR-Lipid). The analytical performances of these different sorbents were compared according to the SANTE/12682/2019 document. The best results were obtained using EMR-Lipid in terms of pesticide average recoveries (103 and 70 of the 179 targeted pesticides exhibited recoveries within 70-120% and 30-70%, respectively, with low RSD values). Moreover, the limits of quantification (LOQ) range from 1.72 µg/kg to 6.39 µg/kg for 173 of the pesticides. Only the recovery for tralkoxydim at 10 μg/kg level was not satisfactory (29%). The matrix effect was evaluated and proved to be limited between -50% and 50% for 169 pesticides with this EMR-Lipid and freezing. GC-Orbitrap analyses confirmed the best efficiency of the EMR-Lipid sorbent for the purification of rapeseeds.
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Affiliation(s)
- Saida Belarbi
- Laboratoire SMS-EA3233, Normandie University, FR3038 INC3M, Unirouen, Place Emile Blondel, F-76821 Mont-Saint-Aignan, France;
- SGS France Laboratoire de Rouen, Technopôle du Madrillet, 65 Avenue Ettore Bugatti, BP 90014, F-76801 Saint Etienne du Rouvray, France; (M.V.); (W.Z.); (A.D.S.)
| | - Martin Vivier
- SGS France Laboratoire de Rouen, Technopôle du Madrillet, 65 Avenue Ettore Bugatti, BP 90014, F-76801 Saint Etienne du Rouvray, France; (M.V.); (W.Z.); (A.D.S.)
| | - Wafa Zaghouani
- SGS France Laboratoire de Rouen, Technopôle du Madrillet, 65 Avenue Ettore Bugatti, BP 90014, F-76801 Saint Etienne du Rouvray, France; (M.V.); (W.Z.); (A.D.S.)
| | - Aude De Sloovere
- SGS France Laboratoire de Rouen, Technopôle du Madrillet, 65 Avenue Ettore Bugatti, BP 90014, F-76801 Saint Etienne du Rouvray, France; (M.V.); (W.Z.); (A.D.S.)
| | - Valerie Agasse
- Laboratoire SMS-EA3233, Normandie University, FR3038 INC3M, Unirouen, Place Emile Blondel, F-76821 Mont-Saint-Aignan, France;
| | - Pascal Cardinael
- Laboratoire SMS-EA3233, Normandie University, FR3038 INC3M, Unirouen, Place Emile Blondel, F-76821 Mont-Saint-Aignan, France;
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12
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Yıldız E, Çabuk H. Dispersive liquid-liquid microextraction method combined with sugaring-out homogeneous liquid-liquid extraction for the determination of some pesticides in molasses samples. J Sep Sci 2021; 44:4151-4166. [PMID: 34510755 DOI: 10.1002/jssc.202100551] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 11/09/2022]
Abstract
In this study, a sensitive analytical method was developed to determine some pesticides (cyprodinil, trifloxystrobin, prometryn, propachlor, fenitrothion, chlorpyrifos, profenofos, and phosalone) in molasses samples. Pesticides were extracted from samples by dispersive liquid-liquid microextraction method combined with sugaring-out homogeneous liquid-liquid extraction and determined by gas chromatography-mass spectrometry analysis. In this method, pesticides in molasses samples were first extracted using a water-miscible solvent (acetonitrile) in the sugaring-out homogeneous liquid-liquid extraction stage. The sugar in the ratio of 84-88% naturally contained in the molasses sample enabled phase separation in the acetonitrile-water homogeneous mixture. Then acetonitrile phase containing pesticides was used as dispersing solvent in the second step of the process. Under the specified optimum conditions, the limit of detection was calculated between 0.8-6.1 ng/g and the limit of quantification was in the range of 2.5-20 ng/g. The relative standard deviation values of molasses samples containing 150 ng/g of each analyte were found to be lower than 4.9% intra-day and 5.6% for inter-day. This validated method has been successfully applied to different types of molasses.
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Affiliation(s)
- Elif Yıldız
- Department of Chemistry, Faculty of Arts and Sciences, Zonguldak Bülent Ecevit University, Zonguldak, Turkey
| | - Hasan Çabuk
- Department of Chemistry, Faculty of Arts and Sciences, Zonguldak Bülent Ecevit University, Zonguldak, Turkey
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13
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Lin L, Song S, Wu X, Liu L, Kuang H, Xu C. Ultrasensitive immunochromatographic strip for the detection of cyhalothrin in foods. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:3040-3049. [PMID: 34132723 DOI: 10.1039/d1ay00609f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
In this study, a highly specific and sensitive monoclonal antibody (mAb) against lambda-cyhalothrin (LCT) was prepared. The half maximal inhibitory concentration (IC50) in the ic-ELISA was 1.2 ng mL-1 and the limit of detection (LOD) value was 0.2 ng mL-1. Based on the mAb, an immunochromatographic strip (ICS) was developed to qualitatively and quantitatively detect LCT in cabbage, parsley, spinach, and green tea samples. The results from the qualitative test can be observed with the naked eye within 10 min, and from quantitative detection experiments the linear detection ranges for cabbage, parsley, spinach, and green tea samples were 2.3-122.0, 1.5-98.2, 2.1-145.5, and 6.6-129.7 ng g-1, respectively. Furthermore, recovery experiments were carried out at three spiked concentrations of LCT (5, 20, and 80 ng g-1), and the recoveries of the ICS in vegetable samples ranged from 81.2% to 96.7%, with a coefficient of variation (CV) of less than 8.1%. For green tea, the recoveries of the ICS were from 80.4% to 90.7%, with a CV of less than 8.7%. The ICS assay established in this study can be used for the qualitative and quantitative determination of LCT residues in foods and agricultural products.
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Affiliation(s)
- Lu Lin
- State Key Lab of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
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14
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Sadowska-Rociek A, Surma M. A survey on thermal processing contaminants occurrence in dark craft beers. J Food Compost Anal 2021. [DOI: 10.1016/j.jfca.2021.103888] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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15
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Evaluation of Aphicidal Effect of Essential Oils and Their Synergistic Effect against Myzus persicae (Sulzer) (Hemiptera: Aphididae). Molecules 2021; 26:molecules26103055. [PMID: 34065463 PMCID: PMC8160842 DOI: 10.3390/molecules26103055] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/14/2021] [Accepted: 05/16/2021] [Indexed: 11/17/2022] Open
Abstract
The insecticidal activities of essential oils obtained from black pepper, eucalyptus, rosemary, and tea tree and their binary combinations were investigated against the green peach aphid, Myzus persicae (Aphididae: Hemiptera), under laboratory and glasshouse conditions. All the tested essential oils significantly reduced and controlled the green peach aphid population and caused higher mortality. In this study, black pepper and tea tree pure essential oils were found to be an effective insecticide, with 80% mortality when used through contact application. However, for combinations of essential oils from black pepper + tea tree (BT) and rosemary + tea tree (RT) tested as contact treatment, the mortality was 98.33%. The essential oil combinations exhibited synergistic and additive interactions for insecticidal activities. The combination of black pepper + tea tree, eucalyptus + tea tree (ET), and tea tree + rosemary showed enhanced activity, with synergy rates of 3.24, 2.65, and 2.74, respectively. Essential oils formulation was effective on the mortality of aphids. Fourier Transform Infrared Spectroscopy (FTIR) analysis showed that stability of a mixture of essential oils was not affected by store temperature (15, 25, and 35 °C) and the functional groups were not changed during storage. Based on our results, the essential oils can be used as a commercial insecticide against M. persicae.
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16
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Nguyen TT, Rosello C, Bélanger R, Ratti C. Fate of Residual Pesticides in Fruit and Vegetable Waste (FVW) Processing. Foods 2020; 9:E1468. [PMID: 33076324 PMCID: PMC7602544 DOI: 10.3390/foods9101468] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/10/2020] [Accepted: 10/12/2020] [Indexed: 11/17/2022] Open
Abstract
Plants need to be protected against pests and diseases, so as to assure an adequate production, and therefore to contribute to food security. However, some of the used pesticides are harmful compounds, and thus the right balance between the need to increase food production with the need to ensure the safety of people, food and the environment must be struck. In particular, when dealing with fruit and vegetable wastes, their content in agrochemicals should be monitored, especially in peel and skins, and eventually minimized before or during further processing to separate or concentrate bioactive compounds from it. The general objective of this review is to investigate initial levels of pesticide residues and their potential reduction through further processing for some of the most contaminated fruit and vegetable wastes. Focus will be placed on extraction and drying processes being amid the main processing steps used in the recuperation of bioactive compounds from fruit and vegetable wastes.
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Affiliation(s)
- Tri Thanh Nguyen
- Soils and Agri-Food Engineering Dept, Institute of Nutrition and Functional Foods, Université Laval, Quebec City, QC G1V 0A6, Canada;
| | - Carmen Rosello
- Chemical Engineering Group, Chemistry Department, Universitat des Iles Balears, Palma, 07122 Mallorca, Spain;
- Soils and Agri-Food Engineering Dept, Université Laval, Quebec City, QC G1V 0A6, Canada
| | - Richard Bélanger
- Plant Science Dept, Université Laval, Quebec City, QC G1V 0A6, Canada;
| | - Cristina Ratti
- Soils and Agri-Food Engineering Dept, Institute of Nutrition and Functional Foods, Université Laval, Quebec City, QC G1V 0A6, Canada;
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17
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Combination of dispersive solid phase extraction with solidification organic drop–dispersive liquid–liquid microextraction based on deep eutectic solvent for extraction of organophosphorous pesticides from edible oil samples. J Chromatogr A 2020; 1627:461390. [DOI: 10.1016/j.chroma.2020.461390] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 06/15/2020] [Accepted: 07/05/2020] [Indexed: 01/10/2023]
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18
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Deng F, Sun J, Dou R, Yu X, Wei Z, Yang C, Zeng X, Zhu L. Contamination of pyrethroids in agricultural soils from the Yangtze River Delta, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 731:139181. [PMID: 32417481 DOI: 10.1016/j.scitotenv.2020.139181] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/30/2020] [Accepted: 05/01/2020] [Indexed: 06/11/2023]
Abstract
This study focused on contamination levels and spatial distributions of four common pyrethroids found in agricultural soils of the Yangtze River Delta (YRD), China. Pyrethroids were detected in 241 soil samples (88.8% detection rate) with total concentrations ranging from <LOD to 53.5 ng/g dry weight. Mean concentrations of the four pyrethroids were measured in descending order as follows: fenpropathrin (4.92 ng/g) > cypermethrin (1.10 ng/g) > deltamethrin (0.89 ng/g) > cyhalothrin (0.20 ng/g). The highest concentration of fenpropathrin was recorded as 37.6 ng/g. The highest detection rate of 63.9% was found for cyhalothrin. A distinct pattern of spatial distribution was observed where high concentrations of pyrethroids were detected in sites around Taihu Lake. Potential sources of pyrethroids in agricultural soils from the YRD region include pyrethroids used for pest control and wastewater irrigation in the region. Redundancy and correlation analyses show that the soil TOC values have played a significant role in the behavior of pyrethroids in agricultural soils of the YRD region. Potential ecological risks of pyrethroids in agricultural soils of the YRD region are low. Cypermethrin and cyhalothrin showed potential toxic effects on the ecological conditions of agricultural soils in 4.6% and 2.9% of the sampling sites, respectively. Further studies should pay more attention to the potential human health risks posed by pyrethroids in agricultural soils for the protection of soil quality and food safety.
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Affiliation(s)
- Fucai Deng
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Jianteng Sun
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China; Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China.
| | - Rongni Dou
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Xiaolong Yu
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Zi Wei
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Chunping Yang
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Xiangfeng Zeng
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China
| | - Lizhong Zhu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
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19
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Dou R, Sun J, Deng F, Wang P, Zhou H, Wei Z, Chen M, He Z, Lai M, Ye T, Zhu L. Contamination of pyrethroids and atrazine in greenhouse and open-field agricultural soils in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 701:134916. [PMID: 31726407 DOI: 10.1016/j.scitotenv.2019.134916] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Revised: 10/06/2019] [Accepted: 10/08/2019] [Indexed: 06/10/2023]
Abstract
A national-scale survey was conducted to assess the levels and distribution of two extensively used pesticides (pyrethroids and atrazine) in greenhouse and open-field soils in 20 provinces across China. Concentrations between 1.30 and 113 ng/g and 0.51-85.4 ng/g for the total pyrethroids (PYs) and of LOD-137 ng/g and LOD-134 ng/g for atrazine were found in greenhouse and open-field soils, respectively. Higher contaminations were found in the greenhouse than in the open fields. The levels of total pyrethroids in 80% of the greenhouses and of atrazine in 60% of the greenhouses were significantly higher than those in the nearby open-field soils (p < 0.05), respectively. The contamination of PYs and atrazine was generally more serious in the northern provinces of China, such as Heilongjiang, Jilin, Liaoning, Beijing, and Hebei. Pearson correlation analysis revealed that the contamination of PYs was significantly correlated with the soil total organic carbon (TOC) value in both greenhouse and open-field soils. Canonical correspondence analysis (CCA) showed that PYs might have an impact on the microbial alpha diversity, while cyhalothrin and cypermethrin may be the key factors affecting the microbial community in the greenhouse and open-field soils. The soil samples containing pesticide residues showed distinct taxonomic and functional communities, where an increased diversity and abundance of microorganisms able to degrade pesticides was observed with high-level PYs contamination. These findings provide useful information for evaluating PYs and atrazine pollution and for contamination management in greenhouse agriculture.
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Affiliation(s)
- Rongni Dou
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Jianteng Sun
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China; Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China.
| | - Fucai Deng
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Pingli Wang
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Haijun Zhou
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Zi Wei
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Meiqin Chen
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Zhenxian He
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Menglan Lai
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Tiancai Ye
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China
| | - Lizhong Zhu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
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20
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Kemmerich M, Demarco M, Bernardi G, Prestes OD, Adaime MB, Zanella R. Balls-in-tube matrix solid phase dispersion (BiT-MSPD): An innovative and simplified technique for multiresidue determination of pesticides in fruit samples. J Chromatogr A 2019; 1612:460640. [PMID: 31668414 DOI: 10.1016/j.chroma.2019.460640] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 10/18/2019] [Accepted: 10/18/2019] [Indexed: 01/03/2023]
Abstract
Sample preparation of complex matrices, like food samples, continues to be a challenge demanding great effort for improvements. In this study, a new technique named balls-in-tube matrix solid-phase dispersion (BiT-MSPD) is proposed based on a simplification of the conventional MSPD technique being all sample preparation performed directly in a closed extraction tube with the assistance of steel balls. An innovative method using BiT-MSPD was successfully established for the determination of 133 pesticide residues in apple, peach, pear and plum by ultra-high performance liquid chromatography with tandem mass spectrometry (UHPLC-MS/MS). Several sorbents were evaluated as solid support in different proportions with the sample. The homogenization step using mortar, glass rod or steel balls, with methanol and acetonitrile as extraction solvent, was evaluated. Vortex and ultrasound assisted extractions were also tested. Best results were obtained with C18, homogenization with steel balls, acetonitrile as solvent and ultrasound assisted extraction. Validation presented adequate trueness and precision results for the evaluated pesticides with recovery results ranging from 72 to 113% and RSD ≤ 17%. Practical limit of detection (LOD) and quantification (LOQ) for the compounds were 3 and 10 µg kg-1, respectively. The developed method proved to be easier and faster to perform than the MSPD, considering that extraction and clean-up are performed in the same tube without the need to transfer to cartridges, recipients or to use a separate clean-up step. The proposed BiT-MSPD technique was successfully applied to fruit samples and has great potential to be applied in other matrices, like cereals and meat, since the steel balls promote an efficient sample dispersion and extraction of pesticides. The BiT-MSPD permit a fully automation of the entire sample preparation step.
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Affiliation(s)
- Magali Kemmerich
- Laboratory of Pesticide Residue Analysis (LARP), Chemistry Department, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil
| | - Marisa Demarco
- Laboratory of Pesticide Residue Analysis (LARP), Chemistry Department, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil
| | - Gabrieli Bernardi
- Laboratory of Pesticide Residue Analysis (LARP), Chemistry Department, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil
| | - Osmar D Prestes
- Laboratory of Pesticide Residue Analysis (LARP), Chemistry Department, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil
| | - Martha B Adaime
- Laboratory of Pesticide Residue Analysis (LARP), Chemistry Department, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil
| | - Renato Zanella
- Laboratory of Pesticide Residue Analysis (LARP), Chemistry Department, Federal University of Santa Maria (UFSM), 97105-900 Santa Maria, RS, Brazil.
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21
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Yuan YY, Wang ST, Cheng Q, Kong DM, Che XG. Simultaneous determination of carbendazim and chlorothalonil pesticide residues in peanut oil using excitation-emission matrix fluorescence coupled with three-way calibration method. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 220:117088. [PMID: 31158606 DOI: 10.1016/j.saa.2019.04.080] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 04/24/2019] [Accepted: 04/29/2019] [Indexed: 06/09/2023]
Abstract
A novel fluorescence application for simultaneous determination of two common fungicide pesticides (carbendazim and chlorothalonil) in peanut oil is presented. Using the strategy of combining excitation-emission matrix (EEM) fluorescence with three-way calibration methods, the proposed approach successfully achieved quantitative analysis of carbendazim and chlorothalonil pesticide residues in peanut oil, even with highly overlapped spectra. It needs little preparation, using "mathematical separation" instead of "analytical separation" to achieve concentration prediction of target analytes in complex systems. Each analyte was performed using fluorescence spectroscopy after instrument spectral correction and scatter removal. Then the data were modeled with two three-way calibration algorithms, including alternating trilinear decomposition (ATLD) and alternating penalty trilinear decomposition (APTLD). The results indicated that APTLD performed slightly better than ATLD for this system. The carbendazim and chlorothalonil can be recognized simultaneously with the correlation coefficients all above 0.96 between resolved spectra and actual spectra. Satisfactory results have been achieved with the average recoveries (mean ± standard deviation) of carbendazim and chlorothalonil being 100.2 ± 6.7% and 99.7 ± 6.7%, respectively. Moreover, as for carbendazim and chlorothalonil, the sensitivity (SENs) are 1.50 × 102 and 3.80 × 102 mL ng-1, the limits of detection (LODs) are 11 ng mL-1 and 4.3 ng mL-1, the limit of quantitation (LOQ) are 33.33 ng mL-1 and 13.03 ng mL-1, respectively. The above results demonstrated that the proposed method is sensitive, fast and accurate for direct quantitative analysis of multiple pesticide residues in complex matrix such as that of peanut oil.
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Affiliation(s)
- Yuan-Yuan Yuan
- Measurement Technology and Instrument Key Lab of Hebei Province, Yanshan University, Qinhuangdao 066004, China
| | - Shu-Tao Wang
- Measurement Technology and Instrument Key Lab of Hebei Province, Yanshan University, Qinhuangdao 066004, China.
| | - Qi Cheng
- Measurement Technology and Instrument Key Lab of Hebei Province, Yanshan University, Qinhuangdao 066004, China
| | - De-Ming Kong
- Measurement Technology and Instrument Key Lab of Hebei Province, Yanshan University, Qinhuangdao 066004, China
| | - Xian-Ge Che
- Measurement Technology and Instrument Key Lab of Hebei Province, Yanshan University, Qinhuangdao 066004, China
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22
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ZHOU YF, WANG ZL, MENG Z, MEN XQ, LI JG, LIU WY. Determination of Pyrethroids and Phthalate Esters in Radix et Rhizoma Glycyrrhizae by Successive Ultrasonic-assisted Extraction and Dispersive Liquid-Liquid Microextraction Followed by Gas Chromatography-Mass Spectrometry. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1016/s1872-2040(19)61184-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Vesicle based ultrasonic-assisted extraction of saponins in Panax notoginseng. Food Chem 2019; 303:125394. [PMID: 31473455 DOI: 10.1016/j.foodchem.2019.125394] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 08/10/2019] [Accepted: 08/18/2019] [Indexed: 01/19/2023]
Abstract
A simple and effective vesicle based ultrasonic-assisted extraction (UAE) method was developed for extraction of active compounds in functional food. The target analytes were determined by ultra-high performance liquid chromatography with ultraviolet detector. Surfactant vesicle was adopted as extraction solvent. Different operating conditions including the type and concentration of vesicle, extraction time and solid to liquid ratio were investigated by single-factor experiments and response surface methodology. Optimized experimental conditions were 1% (w/v) of DTAB/SDS vesicle, 20 min of extraction time and 160 mg/mL of solid to liquid ratio. The proposed method provided good linearity in the linear range of 10-1000 μg/mL with regression coefficients larger than 0.999, low limits of detection of 27.64-55.67 ng/mL, good precision with relative standard deviations below 0.35%, and satisfactory recoveries of 83.84-90.92% for tested saponins. Consequently, the proposed vesicle based UAE method was well suited for the extraction of saponins in Panax notoginseng.
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24
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Song X, Zhang R, Xie T, Wang S, Cao J. Deep Eutectic Solvent Micro-Functionalized Graphene Assisted Dispersive Micro Solid-Phase Extraction of Pyrethroid Insecticides in Natural Products. Front Chem 2019; 7:594. [PMID: 31508413 PMCID: PMC6716533 DOI: 10.3389/fchem.2019.00594] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Accepted: 08/09/2019] [Indexed: 11/13/2022] Open
Abstract
Deep eutectic solvent micro-functionalized graphene (DES-G) was synthesized and first applied as the adsorbent of dispersive micro solid-phase extraction (DMSPE) to extract five pyrethroid insecticides. In DMSPE, the target analytes were absorbed by DES-G and then desorbed by trace eluent, next, the treated samples were quantified via ultra-high performance liquid chromatography equipped with diode-array detection. A scanning electron microscope, transmission electron microscopy and Fourier transform infrared spectrometer were used to characterize the prepared DES-G. Furthermore, this method was verified under the selected conditions with the precision for retention times ranging from 0.43 to 0.57%, and repeatability ranged from 0.04 to 2.41% for peak areas. The developed method was successfully applied to determine pyrethroid insecticides residues in beebread, Curcuma wenyujin and Dendrobium officinale with the recoveries in the range of 80.9–114.1%.
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Affiliation(s)
- Xiaoyu Song
- Medical College, Hangzhou Normal University, Hangzhou, China
| | - Rui Zhang
- Medical College, Hangzhou Normal University, Hangzhou, China
| | - Tian Xie
- Medical College, Hangzhou Normal University, Hangzhou, China
| | - Shuling Wang
- Medical College, Hangzhou Normal University, Hangzhou, China
| | - Jun Cao
- Medical College, Hangzhou Normal University, Hangzhou, China.,College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou, China
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25
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Liao Y, Hou Y, Zhong Y, Chen H, Xu C, Tsunoda M, Zhang Y, Deng S, Song Y. One-step ionic liquid-based ultrasound-assisted dispersive liquid-liquid microextraction coupled with high-performance liquid chromatography for the determination of pyrethroids in traditional Chinese medicine oral liquid preparations. BMC Chem 2019; 13:61. [PMID: 31384809 PMCID: PMC6661737 DOI: 10.1186/s13065-019-0578-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 04/27/2019] [Indexed: 12/26/2022] Open
Abstract
In this study, a simple one-step ionic liquid-based ultrasound-assisted dispersive liquid–liquid microextraction technique was coupled with high-performance liquid chromatography for the analysis of four pyrethroids in three kinds of traditional Chinese medicine oral liquid preparations: simotang oral liquid, kangbingdu oral liquid, and huaji oral liquid. The extraction parameters were examined to improve extraction efficiency. The optimum extraction conditions were 50 μL of 1-octyl-3-methylimidazolium hexafluorophosphate utilized as the extraction solvent and 800 μL of acetonitrile applied as the dispersive solvent. The extraction was assisted by ultrasonication for 8 min. The limits of detection for the four pyrethroids were within 0.007–0.024 mg L−1, and the limits of quantitation ranged between 0.023 and 0.080 mg L−1. The accuracy of the pyrethroid determination ranged from 80.1 to 106.4%. It was indicated that the proposed ionic liquid-based ultrasound-assisted dispersive liquid–liquid microextraction method had an easy operation and was accurate and environmentally friendly. This approach has potential for the analysis of pyrethroids in traditional Chinese medicine oral liquid preparations.
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Affiliation(s)
- Yiyi Liao
- 1Key Laboratory of Tropical Biological Resources of Ministry of Education; Department of Pharmaceutical Sciences, School of Life and Pharmaceutical Sciences, Hainan University, Haikou, 570228 China
| | - Yuge Hou
- 1Key Laboratory of Tropical Biological Resources of Ministry of Education; Department of Pharmaceutical Sciences, School of Life and Pharmaceutical Sciences, Hainan University, Haikou, 570228 China
| | - Yan Zhong
- 1Key Laboratory of Tropical Biological Resources of Ministry of Education; Department of Pharmaceutical Sciences, School of Life and Pharmaceutical Sciences, Hainan University, Haikou, 570228 China
| | - Hong Chen
- 1Key Laboratory of Tropical Biological Resources of Ministry of Education; Department of Pharmaceutical Sciences, School of Life and Pharmaceutical Sciences, Hainan University, Haikou, 570228 China
| | - Chang Xu
- 1Key Laboratory of Tropical Biological Resources of Ministry of Education; Department of Pharmaceutical Sciences, School of Life and Pharmaceutical Sciences, Hainan University, Haikou, 570228 China
| | - Makoto Tsunoda
- 2Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, 113-0033 Japan
| | - Yingxia Zhang
- 1Key Laboratory of Tropical Biological Resources of Ministry of Education; Department of Pharmaceutical Sciences, School of Life and Pharmaceutical Sciences, Hainan University, Haikou, 570228 China
| | - Shiming Deng
- 1Key Laboratory of Tropical Biological Resources of Ministry of Education; Department of Pharmaceutical Sciences, School of Life and Pharmaceutical Sciences, Hainan University, Haikou, 570228 China
| | - Yanting Song
- 1Key Laboratory of Tropical Biological Resources of Ministry of Education; Department of Pharmaceutical Sciences, School of Life and Pharmaceutical Sciences, Hainan University, Haikou, 570228 China
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Solid-Phase Extraction Combined with Dispersive Liquid-Liquid Microextraction Based on Solidification of Floating Organic Droplet for Simultaneous Determination of Organochlorine Pesticides and Polychlorinated Biphenyls in Fish. FOOD ANAL METHOD 2019. [DOI: 10.1007/s12161-019-01527-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Hoisang W, Nacapricha D, Wilairat P, Tiyapongpattana W. Solidification of floating organic droplet microextraction for determination of seven insecticides in fruit juice, vegetables and agricultural runoff using gas chromatography with flame ionization and mass spectrometry detection. J Sep Sci 2019; 42:2032-2043. [DOI: 10.1002/jssc.201801193] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 02/24/2019] [Accepted: 03/28/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Watcharaporn Hoisang
- Department of ChemistryFaculty of Science and TechnologyThammasat University Khlong Luang Pathumthani Thailand
| | - Duangjai Nacapricha
- Flow Innovation Research for Science and Technology Laboratories (FIRST Labs)
- Department of Chemistry and Center of Excellence for Innovation in ChemistryFaculty of ScienceMahidol University Bangkok Thailand
| | - Prapin Wilairat
- Flow Innovation Research for Science and Technology Laboratories (FIRST Labs)
- National Doping Control CentreMahidol University Bangkok Thailand
| | - Warawut Tiyapongpattana
- Department of ChemistryFaculty of Science and TechnologyThammasat University Khlong Luang Pathumthani Thailand
- Flow Innovation Research for Science and Technology Laboratories (FIRST Labs)
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28
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Zhao B, Wu D, Chu H, Wang C, Wei Y. Magnetic mesoporous nanoparticles modified with poly(ionic liquids) with multi-functional groups for enrichment and determination of pyrethroid residues in apples. J Sep Sci 2019; 42:1896-1904. [PMID: 30828963 DOI: 10.1002/jssc.201900038] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 02/23/2019] [Accepted: 02/26/2019] [Indexed: 12/24/2022]
Abstract
Considering that the determination of pyrethroid residues is of value for the safety of food, a new poly(ionic liquid)-functionalized magnetic mesoporous nanoparticle was designed and used as an adsorbent in magnetic solid-phase extraction for the enrichment of eight pyrethroids. The porous structure and large surface area of the mesoporous silica shell endow the adsorbent with abundant binding sites. In contrast to the reported poly(ionic liquids) with only one kind of functional group in the cationic part, the new poly(ionic liquids) with mixed cyano and phenyl groups in cationic part matched the chemical structure of the analytes to improve extraction efficiency. Under the optimum conditions, an effective method was established for the determination of eight pyrethroids in apples. Adsorption equilibrium can be quickly reached in 1 min, greatly decreasing the extraction time. The linearity range was found to be 10-200 ng/g, and the detection limits ranged from 0.24 to 1.99 ng/g. Recoveries of analytes in apple samples ranged from 87.3 to 119.0%, with relative standard deviations varying in the range of 3-21.2% (intraday) and 0.3-15.2% (interday). The results indicate that the proposed method is a good candidate for pyrethroid residues in apple samples.
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Affiliation(s)
- Bihong Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, P. R. China
| | - Dan Wu
- Sunresin New Materials, Xi'an, P. R. China
| | - Huiyuan Chu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, P. R. China
| | - Chaozhan Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, P. R. China
| | - Yinmao Wei
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, P. R. China
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29
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Kapsi M, Tsoutsi C, Paschalidou A, Albanis T. Environmental monitoring and risk assessment of pesticide residues in surface waters of the Louros River (N.W. Greece). THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 650:2188-2198. [PMID: 30292989 DOI: 10.1016/j.scitotenv.2018.09.185] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 09/14/2018] [Accepted: 09/14/2018] [Indexed: 05/19/2023]
Abstract
Estuarine environments are being constantly stressed by new sources of pollution (e.g. pesticides) derived from activities of industry and intensive agriculture. The present study aims at quantify pesticides of three different categories (fungicides, herbicides and insecticides) in the Louros River (Epirus region, North-Western Greece). A monitoring study of 34 compounds was carried out in surface river waters from June 2011 until May 2012. Seven water sampling stations were established and 35 water samples were collected. A solid-phase extraction (SPE) method coupled with gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS), depending on the compound, was developed and validated. During the monitoring study 25 pesticides were detected (13 herbicides, 9 insecticides, 3 fungicides). The most commonly encountered pesticides were quizalofop-ethyl, trifluralin and pendimethaline. Tebufenpyrad was found in all sampling stations and seasons, with the highest concentrations of 0.330 μg/L at Tsopeli Lagoon exceeding the rather low concentrations reported nationwide. Regarding the environmental risk due to the presence of target compounds in surface waters, this was estimated by calculating risk quotients (RQs) for different aquatic organisms (algae, zooplankton and fish). The results denoted a possible threat for the aquatic environment, rendering in this way the RQ method as a useful screening tool. In any case, further extensive study is needed for acetochlor, pirimiphos-methyl, endosulfan-a and azinphos-ethyl in order to better correlate their occurrence and potential toxic effects in aquatic life and humans.
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Affiliation(s)
- Margarita Kapsi
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Ioannina, Panepistimioupolis, Ioannina 45110, Greece
| | - Charoula Tsoutsi
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Ioannina, Panepistimioupolis, Ioannina 45110, Greece
| | - Anastasia Paschalidou
- Department of Forestry and Management of the Environment and Natural Resources, Democritus University of Thrace, 68200, Greece
| | - Triantafyllos Albanis
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Ioannina, Panepistimioupolis, Ioannina 45110, Greece.
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Biodegradation of Pyrethroids by a Hydrolyzing Carboxylesterase EstA from Bacillus cereus BCC01. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9030477] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Microbial degradation has been considered as a rapid, green, and cost-effective technique to reduce insecticide pollutions in a contaminated environment. However, the instability and low efficacy of non-indigenous microorganisms hampers their further exploitation when being introduced into a real environmental matrix. In order to overcome the restriction that these functional microorganisms are under, we investigated the optimal conditions to improve the pyrethroid-degrading ability of one previously isolated bacterium Bacillus cereus BCC01, where 9.6% of the culture suspension (with cell density adjusted to OD600 = 0.6) was inoculated into 50 mL media and cultivated at pH 8 and 30 °C, and its metabolic pathway was illuminated by analyzing the main metabolites via gas chromatography mass spectrometry (GC-MS). Most importantly, a key pyrethroid-hydrolyzing carboxylesterase gene estA was identified from the genomic library of strain BCC01, and then expressed in Escherichia coli BL21 (DE3). After purification, the recombinant protein EstA remained soluble, displaying high degrading activity against different pyrethroids and favorable stability over a wide range of temperatures (from 15 °C to 50 °C) and pH values (6.5–9). Therefore, the EstA-associated biodegradation of pyrethroids was determined, which could provide novel insights to facilitate the practical application of B. cereus BCC01 in the microbial detoxification of pyrethroid contamination.
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31
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Zargaraan A, Mohammadi-Nasrabadi F, Hosseini H, Salmani Y, Bahmaei M, Esfarjani F. Challenges of Edible Oils From Farm to Industry: Views of Stakeholders. Food Nutr Bull 2018; 40:99-110. [PMID: 30518265 DOI: 10.1177/0379572118813758] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE The purpose of this study is to explore stakeholders' views about quality and safety of edible oils from farm to industry and propose policy options to address these challenges. METHODS Semistructured, face-to-face interviews were conducted with 11 experts in the edible oil industry. Participants were selected through purposive and snowball sampling. Open-ended interview questions were used to identify the edible oils' challenges from farm to industry. All interviews were recorded and final transcripts were re-read to obtain categories until themes were developed using directed content analysis and constant comparison methods. RESULTS Six categories in 14 themes with 49 sub themes were explored based on the perspectives of the stakeholders who were responsible for edible oil industry: (1) safety, (2) imports, (3) factory, (4) edible oils' monitoring, (5) edible oil industry, and (6) building consumer trust. The participants' views showed that to increase the quality and safety of edible oils, the following approaches are required: updating food safety regulations, effective inspection, monitoring and surveillance systems, updating laboratory equipment, and controlling the media advertising. CONCLUSIONS In order to build and maintain effective edible oil safety systems, strong links must be established between all sectors responsible. The key players need to have access to reliable and up-to-date information so that timely collective action can be taken. It is recommended that governments face up to this task and lead the way. The research findings seek to offer policy options for government and the stakeholders for challenging future strategies for edible oil industry.
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Affiliation(s)
- Aziz Zargaraan
- 1 Food and Nutrition Policy and Planning Research Department, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Mohammadi-Nasrabadi
- 1 Food and Nutrition Policy and Planning Research Department, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hedayat Hosseini
- 2 Food Science and Technology Department, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Yeganeh Salmani
- 1 Food and Nutrition Policy and Planning Research Department, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Manochehr Bahmaei
- 3 Department of Chemistry, Islamic Azad University (IAU), Tehran north branch, Tehran, Iran
| | - Fatemeh Esfarjani
- 1 Food and Nutrition Policy and Planning Research Department, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Khoshmaram L, Abdolmohammad-Zadeh H, Ghaffarzadeh E. Air-assisted liquid-liquid extraction coupled with dispersive liquid-liquid microextraction and a drying step for extraction and preconcentration of some phthalate esters from edible oils prior to their determination by GC. J Sep Sci 2018; 42:736-743. [PMID: 30480371 DOI: 10.1002/jssc.201800555] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 09/22/2018] [Accepted: 11/19/2018] [Indexed: 11/09/2022]
Abstract
In this work, a new, cheap, simple, fast, and low organic solvent consuming procedure is proposed for isolation, enrichment, and gas chromatographic determination of some phthalate esters in edible oils. The method is based on a combination of air-assisted liquid-liquid extraction and dispersive liquid-liquid microextraction followed by a drying step under N2 gas. Several experimental parameters affecting both extraction and preconcentration steps were investigated and optimized. Under the optimum conditions for the proposed method, wide linear ranges (0.05-800 μg/L) and low detection limits (0.007-0.023 μg/L) were observed. The ranges of enrichment factors and extraction recoveries were 68-340 and 14-68%, respectively. Eventually, the target analytes were successfully determined in different edible oils using the proposed method.
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Affiliation(s)
- Leila Khoshmaram
- Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
| | | | - Elham Ghaffarzadeh
- Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
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33
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Gao YL, Sun P. Determination of five pyrethroid pesticides residue in liquid milk by gas chromatography using multi-walled carbon nanotubes as dispersion solid phase extraction sorbent. ACTA CHROMATOGR 2018. [DOI: 10.1556/1326.2017.00227] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Y. L. Gao
- Testing Centre, Heilongjiang Bayi Agricultural University, Daqing, 163319, P.R. China
- Mudanjiang Food and Bio·Technology Innovation Institute, Heilongjiang Bayi Agricultural University, Mudanjiang, 157000, P.R. China
- ,Test Center of Quality Supervision and Inspection of Processed Agricultural Products in Department of Agriculture, Daqing, 163319, P.R. China
| | - P. Sun
- Testing Centre, Heilongjiang Bayi Agricultural University, Daqing, 163319, P.R. China
- ,Test Center of Quality Supervision and Inspection of Processed Agricultural Products in Department of Agriculture, Daqing, 163319, P.R. China
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Pastor-Belda M, Navarro-Jiménez T, Garrido I, Viñas P, Campillo N, Fenoll J, Hernández-Córdoba M. Magnetic solid-phase extraction or dispersive liquid-liquid microextraction for pyrethroid determination in environmental samples. J Sep Sci 2018; 41:2565-2575. [DOI: 10.1002/jssc.201800109] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/20/2018] [Accepted: 03/21/2018] [Indexed: 01/06/2023]
Affiliation(s)
- Marta Pastor-Belda
- Faculty of Chemistry, Department of Analytical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum”; University of Murcia; Murcia Spain
| | - Tania Navarro-Jiménez
- Faculty of Chemistry, Department of Analytical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum”; University of Murcia; Murcia Spain
| | - Isabel Garrido
- Equipo de Calidad Alimentaria; Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA); Murcia Spain
| | - Pilar Viñas
- Faculty of Chemistry, Department of Analytical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum”; University of Murcia; Murcia Spain
| | - Natalia Campillo
- Faculty of Chemistry, Department of Analytical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum”; University of Murcia; Murcia Spain
| | - José Fenoll
- Equipo de Calidad Alimentaria; Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA); Murcia Spain
| | - Manuel Hernández-Córdoba
- Faculty of Chemistry, Department of Analytical Chemistry, Regional Campus of International Excellence “Campus Mare Nostrum”; University of Murcia; Murcia Spain
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35
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Karami-Osboo R, Maham M. Pre-concentration and Extraction of Aflatoxins from Rice Using Air-Assisted Dispersive Liquid–Liquid Microextraction. FOOD ANAL METHOD 2018. [DOI: 10.1007/s12161-018-1265-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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36
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Yang X, Imasaka T, Imasaka T. Determination of Pesticides by Gas Chromatography Combined with Mass Spectrometry Using Femtosecond Lasers Emitting at 267, 400, and 800 nm as the Ionization Source. Anal Chem 2018; 90:4886-4893. [PMID: 29509001 DOI: 10.1021/acs.analchem.8b00537] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A standard sample mixture containing 51 pesticides was separated by gas chromatography (GC), and the constituents were identified by mass spectrometry (MS) using femtosecond lasers emitting at 267, 400, and 800 nm as the ionization source. A two-dimensional display of the GC/MS was successfully used for the determination of these compounds. A molecular ion was observed for 38 of the compounds at 267 nm and for 30 of the compounds at 800 nm, in contrast to 27 among 50 compounds when electron ionization was used. These results suggest that the ultraviolet laser is superior to the near-infrared laser for molecular weight determinations and for a more reliable analysis of these compounds. In order to study the conditions for optimal ionization, the experimental data were examined using the spectral properties (i.e., the excitation and ionization energies and absorption spectra for the neutral and ionized species) obtained by quantum chemical calculations. A few molecules remained unexplained by the currently reported rules, requiring additional rules for developing a full understanding of the femtosecond ionization process. The pesticides in the homogenized matrix obtained from kabosu ( citrus sphaerocarpa) were measured using lasers emitting at 267 and 800 nm. The pesticides were clearly separated and measured on the two-dimensional display, especially for the data measured at 267 nm, suggesting that this technique would have potential for use in the practical trace analysis of the pesticides in the environment.
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Affiliation(s)
- Xixiang Yang
- Department of Applied Chemistry, Graduate School of Engineering , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
| | - Tomoko Imasaka
- Department of Environmental Design, Graduate School of Design , Kyushu University , 4-9-1, Shiobaru , Minami-ku, Fukuoka 815-8540 , Japan
| | - Totaro Imasaka
- Division of International Strategy, Center of Future Chemistry , Kyushu University , 744 Motooka , Nishi-ku, Fukuoka 819-0395 , Japan
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37
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Wang K, Xie X, Zhang Y, Huang Y, Zhou S, Zhang W, Lin Y, Fan H. Combination of microwave-assisted extraction and ultrasonic-assisted dispersive liquid-liquid microextraction for separation and enrichment of pyrethroids residues in Litchi fruit prior to HPLC determination. Food Chem 2018; 240:1233-1242. [DOI: 10.1016/j.foodchem.2017.08.061] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 08/16/2017] [Accepted: 08/18/2017] [Indexed: 11/27/2022]
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38
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Gao Y, Xu C, Liu S, Sun P. Determination of Seven Pyrethroid Pesticides in Liquid Milk by Dispersive Liquid–Liquid Microextraction Based on the Solidification of a Floating Organic Droplet Followed by GC. Chromatographia 2018. [DOI: 10.1007/s10337-017-3457-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Samsidar A, Siddiquee S, Shaarani SM. A review of extraction, analytical and advanced methods for determination of pesticides in environment and foodstuffs. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2017.11.011] [Citation(s) in RCA: 206] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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40
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Torbati M, Farajzadeh MA, Torbati M, Nabil AAA, Mohebbi A, Afshar Mogaddam MR. Development of salt and pH–induced solidified floating organic droplets homogeneous liquid–liquid microextraction for extraction of ten pyrethroid insecticides in fresh fruits and fruit juices followed by gas chromatography-mass spectrometry. Talanta 2018; 176:565-572. [DOI: 10.1016/j.talanta.2017.08.074] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 08/23/2017] [Accepted: 08/23/2017] [Indexed: 10/19/2022]
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41
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Validation of a Modified QuEChERS Method for the Determination of 167 Pesticides in Milk and Milk Products by LC-MS/MS. FOOD ANAL METHOD 2017. [DOI: 10.1007/s12161-017-1066-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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42
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Sun P, Gao Y, Xu C, Lian Y. Determination of seven pyrethroid pesticide residues in vegetables by gas chromatography using carboxylated multi-walled carbon nanotubes as dispersion solid phase extraction sorbent. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2017; 34:2164-2172. [DOI: 10.1080/19440049.2017.1382725] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Peng Sun
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin, China
- Testing Centre, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Yuling Gao
- Testing Centre, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Chong Xu
- Testing Centre, Heilongjiang Bayi Agricultural University, Daqing, China
| | - Yongfu Lian
- Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials Science, Heilongjiang University, Harbin, China
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Xu F, Liu L. Simultaneous determination of free methamphetamine, pethidine, ketamine and tramadol in urine by dispersive liquid-liquid microextraction combined with GC-MS. Forensic Sci Res 2017; 4:188-194. [PMID: 31304447 PMCID: PMC6610497 DOI: 10.1080/20961790.2017.1377386] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 09/06/2017] [Indexed: 11/06/2022] Open
Abstract
A simple and rapid dispersive liquid–liquid microextraction (DLLME) technique coupled with gas chromatography–ion trap mass spectrometry (GC–MS) was developed for the extraction and analysis of methamphetamine (MA), pethidine (PD), ketamine (KT) and tramadol (TD) from human urine. In this study, different parameters affecting the extraction process such as the type and volume of extraction solvent, type and volume of disperser solvent, extraction time and pH value and salt effect were studied and optimized. Under optimized conditions, the enrichment factor ranged from 185 to 226 and the average recovery ranged from 80.45% to 95.55%. The linear range was 10.0–1000.0 µg/L, the limit of detection and quantitation were in the range 0.43–1.96 µg/L and 1.44–6.53 µg/L, respectively. The relative standard deviations were in the range 1.98%–3.90% (n = 7). The obtained results show that DLLME combined with GC–MS is a fast and simple method for the determination of MA, PD, KT and TD in human urine.
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Affiliation(s)
- Fangmin Xu
- Institute of Forensic Science, Public Security Bureau of Jiangyin, Jiangsu, China
| | - Lingyun Liu
- Institute of Forensic Science, Public Security Bureau of Jiangyin, Jiangsu, China
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44
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Kaczyński P. Large-scale multi-class herbicides analysis in oilseeds by rapid one-step QuEChERS-based extraction and cleanup method using liquid chromatography–tandem mass spectrometry. Food Chem 2017; 230:411-422. [DOI: 10.1016/j.foodchem.2017.03.076] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 01/29/2017] [Accepted: 03/13/2017] [Indexed: 11/25/2022]
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45
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Beghoul A, Kebieche M, Gasmi S, Chouit Z, Amiour C, Lahouel A, Lakroun Z, Rouabhi R, Fetoui H, Soulimani R. Impairment of mitochondrial integrity and redox status in brain regions during a low-dose long-term exposition of rats to pyrethrinoïds: the preventive effect of quercetin. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:19714-19722. [PMID: 28685329 DOI: 10.1007/s11356-017-9675-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 06/27/2017] [Indexed: 06/07/2023]
Abstract
Pyrethrinoïds are synthetic pesticides widely used in agriculture and farms to protect crops from weeds, insects, fungi, and molds. Increased and uncontrolled use of these pollutants can have harmful effects on human health via consumption of contaminated food products. In the present study, deltamethrin (DLT = 3.72 mg/kg) and Bifenthrin (BF = 2.6 mg/kg) were used during a long-term exposition in the rats to assess their effect on mitochondrial integrity and function in different brain areas (hippocampus, striatum, cortex, and cerebellum). The results of this study have shown that chronic treatment of rats by both DLT and BF, on their own or in a mixture, has induced a significant increase in mitochondrial MDA, but when quercetin (Que) was co-administered with pesticides, this enhancement has been prevented in the almost of treated rats compared to solvent and control groups. In hippocampus area, GSH has significantly increased in all treated rats, except for BF and DLT-Que.-treated groups. In striatum, GSH has been depleted in the BF and DLT-treated groups compared to control and solvent groups; in contrast, when Que. was associated with pesticides, the rate of this tripeptide has been maintained at normal levels. In the cortex and cerebellum, GSH has been depleted significantly in all treated animals but has increased in DLT-Que. and mixture-Que.-treated groups in the cerebral cortex, at the same time; it has been maintained at normal levels in BF-Que.-treated groups in the cerebellum compared to control and solvent rats. On the other side, the results of this study have shown a loss of catalase (CAT) and glutathione S-transferase (GST) activities in all brain regions of pesticide-treated rats, but such a fall in enzymatic activities has been prevented by Que. when it was co-administered to rats with pesticides at the dose of 5 mg/kg, except in the cerebellum. In addition, this study has shown mitochondria's swelling in almost all the brain areas with exception of the cerebellum, providing information about a loss of mitochondrial membrane integrity in brain neurons of rats exposed to pyrethrinoïds. Furthermore, preventive administration of Que., in association with pesticides (5 mg/kg) or their mixture (10 mg/kg), has prevented mitochondria swelling in almost all of the analyzed brain tissues.
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Affiliation(s)
- Afafe Beghoul
- Laboratory of Cellular and Molecular Biology, University of Mohamed Seddik Ben Yahia, Jijel, Algeria
- Laboratory of Phytochemistry and Pharmacology, University of Mohamed Seddik Ben Yahia, Jijel, Algeria
| | - Mohamed Kebieche
- Laboratory of Cellular and Molecular Biology, University of Mohamed Seddik Ben Yahia, Jijel, Algeria.
- Unité de Recherche Animal et Fonctionnalités des Produits Animaux (UR AFPA), EA3998, INRA USC 0340, Micropolluants et Résidus de la Chaine Alimentaire (MRCA), Neurotoxicologie Alimentaire et Bioactivité, Université de Lorraine, BP 4102, 57040, Metz, France.
| | - Salim Gasmi
- Faculty of SESNV, Applied Biology Department, University of Tebessa, Tebessa, Algeria
| | - Zeyneb Chouit
- Laboratory of Cellular and Molecular Biology, University of Mohamed Seddik Ben Yahia, Jijel, Algeria
| | - Chouaib Amiour
- Laboratory of Cellular and Molecular Biology, University of Mohamed Seddik Ben Yahia, Jijel, Algeria
| | - Asma Lahouel
- Laboratory of Cellular and Molecular Biology, University of Mohamed Seddik Ben Yahia, Jijel, Algeria
| | - Zhora Lakroun
- Laboratory of Cellular and Molecular Biology, University of Mohamed Seddik Ben Yahia, Jijel, Algeria
| | - Rachid Rouabhi
- Faculty of SESNV, Applied Biology Department, University of Tebessa, Tebessa, Algeria
| | - Hamadi Fetoui
- Toxicology-Microbiology and Environmental Health Unit (UR11ES70), University of Sfax, Sfax, Tunisia
| | - Rachid Soulimani
- Unité de Recherche Animal et Fonctionnalités des Produits Animaux (UR AFPA), EA3998, INRA USC 0340, Micropolluants et Résidus de la Chaine Alimentaire (MRCA), Neurotoxicologie Alimentaire et Bioactivité, Université de Lorraine, BP 4102, 57040, Metz, France
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Fang Y, Tian W, Pei F, Li P, Shao X, Fan Y, Hu Q. Simultaneous determination of pesticide residues and antioxidants in blended oil using a liquid-liquid extraction combined with dispersive solid phase extraction method. Food Chem 2017; 229:347-353. [DOI: 10.1016/j.foodchem.2017.02.094] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 01/16/2017] [Accepted: 02/18/2017] [Indexed: 11/26/2022]
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47
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Low temperature cleanup combined with magnetic nanoparticle extraction to determine pyrethroids residue in vegetables oils. Food Control 2017. [DOI: 10.1016/j.foodcont.2016.11.036] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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48
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Farajzadeh MA, Feriduni B, Afshar Mogaddam MR. Extraction and preconcentration of triazine pesticides using rapid, simple, and disperser solventless microextraction technique followed by gas chromatography–nitrogen phosphorous detection. EUR J LIPID SCI TECH 2017. [DOI: 10.1002/ejlt.201600208] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mir Ali Farajzadeh
- Faculty of ChemistryDepartment of Analytical ChemistryUniversity of TabrizTabrizIran
| | - Behruz Feriduni
- Faculty of ChemistryDepartment of Analytical ChemistryUniversity of TabrizTabrizIran
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49
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50
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Mandlate JS, Soares BM, Seeger TS, Vecchia PD, Mello PA, Flores EMM, Duarte FA. Determination of cadmium and lead at sub-ppt level in soft drinks: An efficient combination between dispersive liquid-liquid microextraction and graphite furnace atomic absorption spectrometry. Food Chem 2016; 221:907-912. [PMID: 27979292 DOI: 10.1016/j.foodchem.2016.11.075] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 11/08/2016] [Accepted: 11/18/2016] [Indexed: 01/14/2023]
Abstract
A DLLME method for extraction and preconcentration of Cd and Pb from soft drinks and further determination by GF AAS was developed. Important parameters of DLLME such as the type and volume of dispersive and extraction solvents, concentration of DDTC (complexing agent) and pH were evaluated. Better results were obtained using 500μL of acetone for Cd and 700μL of acetonitrile for Pb as dispersive solvents, 60μL of CCl4 as extraction solvent for both analytes and 500μL of 1.5% DDTC solution. Accuracy was evaluated by recovery assays and ranged from 91 to 113% for Cd and from 95 to 108% for Pb, with RSD below 10 and 7%, respectively. The LODs were 0.006 and 0.072ngL-1 for Cd and Pb, respectively. The optimized method was applied for the determination of Cd and Pb in soft drinks with different brands and flavours.
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Affiliation(s)
- Jaime S Mandlate
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil; Escola de Química e Alimentos, Universidade Federal do Rio Grande, 96203-900 Rio Grande, RS, Brazil; Departamento de Química, Universidade Eduardo Mondlane, 257, Maputo, Mozambique
| | - Bruno M Soares
- Escola de Química e Alimentos, Universidade Federal do Rio Grande, 96203-900 Rio Grande, RS, Brazil
| | - Tassia S Seeger
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Paula Dalla Vecchia
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Paola A Mello
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Erico M M Flores
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil
| | - Fabio A Duarte
- Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil.
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