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Vasca E, Siano F, Caruso T. Fluorescence Detecting of Paraquat and Diquat Using Host-Guest Chemistry with a Fluorophore-Pendant Calix[6]arene. SENSORS (BASEL, SWITZERLAND) 2023; 23:1120. [PMID: 36772161 PMCID: PMC9920563 DOI: 10.3390/s23031120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/11/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Paraquat (PQ) and diquat (DQ), some of the most widely used herbicides in the world, both present a high mortality index after intentional exposure. In this paper, a fluorescence sensing method for PQ and DQ, based on host-guest molecular recognition, is proposed. Calix[6]arene derivatives containing anthracene or naphthalene as pendant fluorophore at their lower rim recognize DQ and PQ in hydroalcoholic solution with a broad linear response range at the μg L-1 level concentration. The linear response ranges were found from 1.0 to 18 μg L-1 with the detection limit of 31 ng L-1 for paraquat, and from 1.0 to 44 μg L-1 with the detection limit of 0.16 μg L-1 for diquat. The recognition process is detected by following the decrease in the fluorescence emission consequent to complexation. The proposed quenching method has been applied to the determination of paraquat in drinking water samples.
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Affiliation(s)
- Ermanno Vasca
- Department of Chemistry and Biology, University of Salerno, 84084 Fisciano, Italy
| | - Francesco Siano
- Institute of Food Science, National Research Council, 83100 Avellino, Italy
| | - Tonino Caruso
- Department of Chemistry and Biology, University of Salerno, 84084 Fisciano, Italy
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2
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Rajaram R, Neelakantan L. Recent advances in estimation of paraquat using various analytical techniques: A review. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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3
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Prukjareonchook A, Alahmad W, Kraiya C, Kulsing C, Chaisuwan T, Dubas L. A selective and sensitive colorimetric method for semi-automated solid-phase extraction of atrazine in environmental water samples. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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4
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Niu Z, Liu Y, Li X, Yan K, Chen H. Electrochemical sensor for ultrasensitive detection of paraquat based on metal-organic frameworks and para-sulfonatocalix[4]arene-AuNPs composite. CHEMOSPHERE 2022; 307:135570. [PMID: 35803381 DOI: 10.1016/j.chemosphere.2022.135570] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 06/24/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
The widespread occurrence of pesticides in surface water, groundwater, soil, and food has received increasing attention towards environmental safety. Paraquat (PQ) is world widely used as a rapid sterilant herbicide and is highly toxic to humans. A simple, rapid, sensitive, and on-site detection method for the water environment to detection of PQ is urgently required. Here, we prepared a zeolite imidazole skeleton-8 (ZIF-8) and para-sulfonylcalix[4]arene (pSC4) coated gold nanoparticles composite (pSC4-AuNPs@ZIF-8) by one-step method. An electrochemical biosensor assay for PQ was established based on pSC4-AuNPs@ZIF-8 modified glassy carbon electrode through host-guest recognition of PQ and pSC4. Under the optimal conditions, recoveries of targets determination results were 92.7%-103% (n = 3), respectively. The quantity PQ detection limit was found to be 0.49 pM. Therefore, the signal amplification strategy based on pSC4-AuNPs@ZIF-8 has potential value in detecting trace pollutants in the water environment.
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Affiliation(s)
- Zhijuan Niu
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Yawen Liu
- School of Medicine, Shanghai University, Shanghai, 200444, PR China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China
| | - Xin Li
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China
| | - Kai Yan
- Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, PR China.
| | - Hongxia Chen
- School of Life Sciences, Shanghai University, Shanghai, 200444, PR China.
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5
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All-Step-in-One Test Kit for Paraquat Detection in Water and Vegetable Samples. ANALYTICA 2022. [DOI: 10.3390/analytica3010007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This work presents the first development of an all-steps-in-one test kit for the determination of paraquat in natural water, and vegetable and agricultural samples. A handheld photometer incorporated with a magnetic stirrer was used to complete the steps of extraction, mixing, and detection. Paraquat produces a blue free radical ion via a reduction with sodium dithionite in alkaline conditions. Sodium dithionite powder was investigated for the enhancement of reagent stability duration, which was added directly into sample solution that showed insignificant difference in sensitivity as compared with that of the solution format of sodium dithionite. The developed test kit showed good performance with the linear calibration of 0.5 to 10 mg L−1 with a high coefficient of determination (r2 = 0.9947). The lower limit of quantitation (LLOQ = 3SD of intercept per slope) carried out from the method using the handheld photometer was 0.50 mg L−1. The limit of detection (LOD) by naked eye was 0.30 mg L−1. The recovery study was acceptable in the range of 101–115%. Intraday (n = 3) and interday (n = 3) precision was less than 1%. On the basis of the significance test at the 95% confidence interval, quantitative results of the developed test kit agreed well with those from high-performance liquid chromatography (HPLC). To the best of our knowledge, this is the first report demonstrating an online extraction for vegetables incorporated into a test kit, applicable for on-site analysis. Single-point calibration based on the Beer–Lambert law also demonstrated the measurement of paraquat. In testing with a nominal standard solution of 5.00 mg L−1 paraquat, the reading concentration was 5.09 ± 0.03 mg L−1 paraquat (n = 20) with a K value of 0.0967 (close to the slope of multipoint calibration). This research is a direct benefit to agricultural products and the health of a population for the analysis of pesticides and herbicides.
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Somnet K, Thimoonnee S, Karuwan C, Kamsong W, Tuantranont A, Amatatongchai M. Ready-to-use paraquat sensor using a graphene-screen printed electrode modified with a molecularly imprinted polymer coating on a platinum core. Analyst 2021; 146:6270-6280. [PMID: 34549734 DOI: 10.1039/d1an01278a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We propose the fabrication of a novel ready-to-use electrochemical sensor based on a screen-printed graphene paste electrode (SPGrE) modified with platinum nanoparticles and coated with a molecularly imprinted polymer (PtNPs@MIP) for sensitive and cost-effective detection of paraquat (PQ) herbicide. Successive coating of the PtNPs surface with SiO2 and vinyl end-groups formed the PtNPs@MIP. Next, we terminated the vinyl groups with a molecularly imprinted polymer (MIP) shell. MIP was attached to the PtNPs cores using PQ as the template, methacrylic acid (MAA) as the monomer, ethylene glycol dimethacrylate (EGDMA) as the cross-linker, and 2,2'-azobisisobutyronitrile (AIBN) as the initiator. Coating the SPGrE surface with PtNPs@MIP furnished the PQ sensor. We studied the electrochemical mechanism of PQ on the MIP sensor using cyclic voltammetry (CV) experiments. The PQ oxidation current signal appears at -1.08 V and -0.71 V vs. Ag/AgCl using 0.1 M potassium sulfate solution. Quantitative analysis was performed by anodic stripping voltammetry (ASV) using a deposition potential of -1.4 V for 60 s and linear sweep voltammetric stripping. The MIP sensor provides linearity from 0.05 to 1000 μM (r2 = 0.999), with a lower detection limit of 0.02 μM (at -0.71 V). The compact imprinted sensor gave a highly sensitive and selective signal toward PQ. The ready-to-use MIP sensor can provide an alternative approach to the determination of paraquat residue on vegetables and fruits for food safety applications.
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Affiliation(s)
- Kanpitcha Somnet
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani 34190, Thailand.
| | - Suphatsorn Thimoonnee
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani 34190, Thailand.
| | - Chanpen Karuwan
- Graphene sensor laboratory (GPL), Graphene and Printed Electronics for Dual-Use Applications Research Division (GPERD), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
| | - Wichayaporn Kamsong
- Graphene sensor laboratory (GPL), Graphene and Printed Electronics for Dual-Use Applications Research Division (GPERD), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
| | - Adisorn Tuantranont
- Graphene sensor laboratory (GPL), Graphene and Printed Electronics for Dual-Use Applications Research Division (GPERD), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
| | - Maliwan Amatatongchai
- Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani 34190, Thailand.
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7
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Automated liquid–liquid extraction procedure for the photometric determination of nanogram levels of Hg(II) in soil and sediment extracts. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104978] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Pourakbari Z, Aliakbar A, Sheykhan M. A metal-catex composite electrode for determination of paraquat in various samples by Ad-differential pulse cathodic stripping voltammetry. Talanta 2020; 212:120793. [PMID: 32113555 DOI: 10.1016/j.talanta.2020.120793] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 01/27/2020] [Accepted: 01/28/2020] [Indexed: 11/19/2022]
Abstract
In this work, a novel kind of metal-catex composite electrode for determination of paraquat (PQ) by adsorptive differential pulse voltammetry is introduced. The metal-catex composite electrode was fabricated by cathodic electropolymerization of p-nitrophenol and p-nitrobenzoic acid in the presence of tin (II) chloride as a scaffold for composite structure on prepared glassy carbon electrode. Electropolymerization was carried out in sodium acetate medium. The surface of the fabricated electrode was characterized with field emission scanning electron microscope and energy-dispersive X-ray spectrometry. The obtained results show that there are Sn nanoparticles in the structure of the catex-composite. Chemical structure of metal-catex composite electrode was investigated using FTIR (ATR), 13C NMR, H NMR and a suitable mechanism for electropolymerization has been proposed. This metal-catex composite electrode was applied for determinations of PQ using sodium acetate buffer solutions at pH = 6.5 as an electrolyte solution. All parameters influencing the performance of the fabricated electrode were studied and optimized. The proposed electrode exhibits good linearity versus PQ concentration in the range of 3.8 × 10-8 to 7.7 × 10-7 mol L-1 and shows a manifold increase in sensitivity (more than 30 times) as compared to the glassy carbon electrode. The LOQ of this electrode was 7.78 × 10-9 mol L-1, which is comparable with that of other electrochemical methods. The mean, standard deviation and relative standard deviation for seven repetitive determinations of paraquat (7.78 × 10-8 mol L-1) were measured to be 7.75 × 10-8 mol L-1, ±0.29 × 10-8 mol L-1, and 3.75% respectively. This electrode was applied for the determination of paraquat in natural water, natural juice, potatoes and onions. The introduced electrode shows good stability with repeated use and over long periods (about 20 days). There is a good agreement between the results for water analysis by this method and the standard method.
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Affiliation(s)
- Zahra Pourakbari
- Department of Chemistry, Faculty of Science, University of Guilan, P. O. Box 4193833697, Rasht, Iran
| | - Alireza Aliakbar
- Department of Chemistry, Faculty of Science, University of Guilan, P. O. Box 4193833697, Rasht, Iran.
| | - Mehdi Sheykhan
- Department of Chemistry, Faculty of Science, University of Guilan, P. O. Box 4193833697, Rasht, Iran
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9
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Zhao Q, Li SH, Chai RL, Ren X, Zhang C. Two-Dimensional Conductive Metal-Organic Frameworks Based on Truxene. ACS APPLIED MATERIALS & INTERFACES 2020; 12:7504-7509. [PMID: 31965783 DOI: 10.1021/acsami.9b23416] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Two dimensional conductive metal-organic frameworks (2D cMOFs) have been widely applied as electrocatalysts, electronic devices, and sensors. In addition, their intrinsic electronic properties could be efficiently tuned via varying the conjugated linkers. Herein, we report a novel 2D cMOF based on complexation of 2,3,7,8,12,13-hexahydroxyl truxene and copper ions via the energy economical interfacial reaction. This 2D cMOF was obtained as a brilliant black powder and showed a bulk electrical conductivity of 3.5 × 10-3 S cm-1 at 30 °C. Additionally, the cMOF-modified glassy carbon electrode could act as an electrochemical sensor for sensing paraquat with a limit of detection at 4.1 × 10-8 M (S/N = 3). The accession of truxene-Cu to the cMOF family would shed new light on the impact of the organic conjugated linker and broaden the scope of cMOFs' applications.
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Affiliation(s)
- Qian Zhao
- Institute of Molecular Plus , Tianjin University , Weijin Rd. 92 , Tianjin 300072 , P. R. China
| | - Sheng-Hua Li
- College of Chemical Engineering and Materials Science , Tianjin University of Science & Technology , Tianjin 300457 , P. R. China
| | - Rui-Lin Chai
- College of Chemical Engineering and Materials Science , Tianjin University of Science & Technology , Tianjin 300457 , P. R. China
| | - Xv Ren
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science , Tianjin University , Weijin Rd. 92 , Tianjin 300072 , P. R. China
| | - Chun Zhang
- Institute of Molecular Plus , Tianjin University , Weijin Rd. 92 , Tianjin 300072 , P. R. China
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10
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Xiang H, Cai Q, Li Y, Zhang Z, Cao L, Li K, Yang H. Sensors Applied for the Detection of Pesticides and Heavy Metals in Freshwaters. JOURNAL OF SENSORS 2020; 2020:1-22. [DOI: 10.1155/2020/8503491] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Water is essential for every life living on the planet. However, we are facing a more serious situation such as water pollution since the industrial revolution. Fortunately, many efforts have been done to alleviate/restore water quality in freshwaters. Numerous sensors have been developed to monitor the dynamic change of water quality for ecological, early warning, and protection reasons. In the present review, we briefly introduced the pollution status of two major pollutants, i.e., pesticides and heavy metals, in freshwaters worldwide. Then, we collected data on the sensors applied to detect the two categories of pollutants in freshwaters. Special focuses were given on the sensitivity of sensors indicated by the limit of detection (LOD), sensor types, and applied waterbodies. Our results showed that most of the sensors can be applied for stream and river water. The average LOD was72.53±12.69 ng/ml (n=180) for all pesticides, which is significantly higher than that for heavy metals (65.36±47.51 ng/ml,n=117). However, the LODs of a considerable part of pesticides and heavy metal sensors were higher than the criterion maximum concentration for aquatic life or the maximum contaminant limit concentration for drinking water. For pesticide sensors, the average LODs did not differ among insecticides (63.83±17.42 ng/ml,n=87), herbicides (98.06±23.39 ng/ml,n=71), and fungicides (24.60±14.41 ng/ml,n=22). The LODs that differed among sensor types with biosensors had the highest sensitivity, while electrochemical optical and biooptical sensors showed the lowest sensitivity. The sensitivity of heavy metal sensors varied among heavy metals and sensor types. Most of the sensors were targeted on lead, cadmium, mercury, and copper using electrochemical methods. These results imply that future development of pesticides and heavy metal sensors should (1) enhance the sensitivity to meet the requirements for the protection of aquatic ecosystems and human health and (2) cover more diverse pesticides and heavy metals especially those toxic pollutants that are widely used and frequently been detected in freshwaters (e.g., glyphosate, fungicides, zinc, chromium, and arsenic).
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Affiliation(s)
- Hongyong Xiang
- Key Laboratory of Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, Jilin 130024, China
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, Yunnan 650500, China
| | - Qinghua Cai
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Yuan Li
- Northwest Land and Resources Research Center, Shaanxi Normal Northwest University, China
| | - Zhenxing Zhang
- Key Laboratory of Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, Jilin 130024, China
- State Environmental Protection Key Laboratory of Wetland Ecology and Vegetation Restoration, Northeast Normal University, Changchun, Jilin 130024, China
| | - Lina Cao
- Ecology and Environment Department of Jilin Province, Changchun, Jilin 130024, China
| | - Kun Li
- Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region, Heilongjiang University, Harbin 150080, China
| | - Haijun Yang
- Key Laboratory of Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, Jilin 130024, China
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming, Yunnan 650500, China
- School of Life Science and Geology, Yili Normal University, Yili, Xinjiang 835000, China
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11
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Pacheco MR, Barbosa SC, Quadrado RFN, Fajardo AR, Dias D. Glassy carbon electrode modified with carbon black and cross-linked alginate film: a new voltammetric electrode for paraquat determination. Anal Bioanal Chem 2019; 411:3269-3280. [DOI: 10.1007/s00216-019-01769-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 02/28/2019] [Accepted: 03/07/2019] [Indexed: 12/11/2022]
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12
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Dominguez MA, Insausti M, Ilari R, Zanini GP. Fluorescence enhancement novel green analytical method for paraquat herbicide quantification based on immobilization on clay. Analyst 2019; 144:3357-3363. [DOI: 10.1039/c9an00387h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Fluorescence emission enhancement by adsorption as a promising tool for the development of future green sensors.
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Affiliation(s)
- Marina A. Dominguez
- INQUISUR
- Departamento de Química
- Universidad Nacional del Sur (UNS)-CONICET
- 8000 Bahía Blanca
- Argentina
| | - Matías Insausti
- INQUISUR
- Departamento de Química
- Universidad Nacional del Sur (UNS)-CONICET
- 8000 Bahía Blanca
- Argentina
| | - Romina Ilari
- INQUISUR
- Departamento de Química
- Universidad Nacional del Sur (UNS)-CONICET
- 8000 Bahía Blanca
- Argentina
| | - Graciela P. Zanini
- INQUISUR
- Departamento de Química
- Universidad Nacional del Sur (UNS)-CONICET
- 8000 Bahía Blanca
- Argentina
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13
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Ou Sha, Wang Y, Chen XB, Chen J, Chen L. Determination of Paraquat in Environmental Water by Ionic Liquid-Based Liquid Phase Extraction with Direct Injection for HPLC. JOURNAL OF ANALYTICAL CHEMISTRY 2018. [DOI: 10.1134/s1061934818090083] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Zhao Z, Zhang F, Zhang Z. A facile fluorescent "turn-off" method for sensing paraquat based on pyranine-paraquat interaction. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 199:96-101. [PMID: 29573700 DOI: 10.1016/j.saa.2018.03.042] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 03/09/2018] [Accepted: 03/12/2018] [Indexed: 06/08/2023]
Abstract
Development of a technically simple yet effective method for paraquat (PQ) detection is of great importance due to its high clinical and environmental relevance. In this study, we developed a pyranine-based fluorescent "turn-off" method for PQ sensing based on pyranine-PQ interaction. We investigated the dependence of analytical performance of this method on the experimental conditions, such as the ion strength, medium pH, and so on. Under the optimized conditions, the method is sensitive and selective, and could be used for PQ detection in real-world sample. This study essentially provides a readily accessible fluorescent system for PQ sensing which is cheap, robust, and technically simple, and it is envisaged to find more interesting clinical and environmental applications.
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Affiliation(s)
- Zuzhi Zhao
- Anhui Medical University, School of Basic Medicine, Hefei 230031, China
| | - Fengwei Zhang
- Anhui Medical University, School of Life Science, Hefei 230031, China
| | - Zipin Zhang
- Anhui University of Chinese Medicine, School of Pharmacy, Hefei 230012, China.
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15
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Chuntib P, Themsirimongkon S, Saipanya S, Jakmunee J. Sequential injection differential pulse voltammetric method based on screen printed carbon electrode modified with carbon nanotube/Nafion for sensitive determination of paraquat. Talanta 2017; 170:1-8. [PMID: 28501144 DOI: 10.1016/j.talanta.2017.03.073] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 03/24/2017] [Indexed: 11/30/2022]
Abstract
The screen-printed carbon electrode (SPCE) modified with various nanoparticles has been studied for using as a working electrode in voltammetric technique. The electrochemical behavior of paraquat on different electrodes was studied by cyclic voltammetry (CV), and then differential pulse voltammetry (DPV) has been employed for trace analysis of paraquat based on redox reaction which the peak current was directly proportional to the concentration of paraquat in the solution. The SPCE modified with carbon nanotube dispersed in Nafion and ethanol (SPCE-CNT/Nafion) gave the best result. Sequential injection-differential pulse voltammetric (SI-DPV) method has been developed for more automated analysis and to reduce chemical consumption. The parameters affecting the SI-DPV system such as step potential, modulation amplitude, flow rate, and concentration of sodium chloride as an electrolyte were studied to improve the sensitivity. Under the optimum condition of the system, i.e., Nafion concentration of 1% (w/v), volume of CNT suspension of 2µL, flow rate of 100µLs-1, step potential of 5mV, modulation amplitude of 100mV and concentration of sodium chloride of 1M, a linear calibration graph in the range of 0.54-4.30µM with a good R2 of 0.9955 and a limit of detection of 0.17µM (0.03mgL-1) were achieved. The proposed system shows high tolerance to some possible interfering ions in natural water, surfactant, and other pesticides. The relative standard deviation (RSD) was 4.2% for 11 replicate measurements with the same electrode. The reproducibility for the preparation of 7 modified electrodes was 2.3% RSD. Recoveries of the analysis were obtained in the range of 82-106%. The developed system can be conveniently applied for analysis without pretreatment of the samples.
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Affiliation(s)
- Prakit Chuntib
- Department of Chemistry and Research Laboratory for Analytical Instrument and Electrochemistry Innovation, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Suwaphid Themsirimongkon
- Department of Chemistry and Research Laboratory for Analytical Instrument and Electrochemistry Innovation, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Surin Saipanya
- Department of Chemistry and Research Laboratory for Analytical Instrument and Electrochemistry Innovation, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Jaroon Jakmunee
- Department of Chemistry and Research Laboratory for Analytical Instrument and Electrochemistry Innovation, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
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16
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He H, Liu S, Li H, Chen T. Selenium–phycocyanin from selenium-enriched cultures of Nostoc sp. isolated from rice field prevents human kidney cells from paraquat-induced damage. RSC Adv 2017. [DOI: 10.1039/c7ra08250a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Herein we demonstrate that Se-containing phycocyanin (Se–PC) purified from Se-enriched cultures of Nostoc sp. could reverse paraquat (PQ)-induced DNA cell apoptosis through inhibition of superoxide overproduction in human kidney cells.
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Affiliation(s)
- Hongzhi He
- Key Laboratory of Agro-Environment in the Tropics
- Ministry of Agriculture
- South China Agricultural University
- Guangzhou 510642
- China
| | - Saijun Liu
- Department of Dermatology and Venerology
- The First Affiliated Hospital of Jinan University
- Guangzhou 510630
- China
| | - Huashou Li
- Key Laboratory of Agro-Environment in the Tropics
- Ministry of Agriculture
- South China Agricultural University
- Guangzhou 510642
- China
| | - Tianfeng Chen
- Department of Chemistry
- Jinan University
- Guangzhou 510632
- China
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17
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Determination of paraquat and diquat: LC-MS method optimization and validation. Food Chem 2016; 209:248-55. [DOI: 10.1016/j.foodchem.2016.04.069] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 12/02/2015] [Accepted: 04/18/2016] [Indexed: 11/20/2022]
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18
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Martins EC, Melo VDF, Abate G. Evaluation of flow injection analysis method with spectrophotometric detection for the determination of atrazine in soil extracts. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2016; 51:609-615. [PMID: 27192103 DOI: 10.1080/03601234.2016.1181906] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A method for determining atrazine in soil extracts was evaluated by flow injection analysis with spectrophotometric detection. The method is based on the reaction of atrazine with pyridine in an acid medium followed by the reaction with NaOH and sulfanilic acid. Several analytical conditions were previously studied and optimized. Under the best conditions of analysis, the limits of detection and quantification were 0.15 and 0.45 mg L(-1), respectively, for a linear response between 0.50 and 2.50 mg L(-1), and a sampling throughput of 21 determinations per hour. Using the standard addition method, the maximum relative standard deviation of 17% and recovery values between 80 and 100% were observed for three extracts from soil samples with different composition. The proposed method is simple, low-cost and easy to use, and can be employed for studies involving atrazine in soil samples or for screening of atrazine in soils.
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Affiliation(s)
- Elisandra C Martins
- a Department of Chemistry , Federal University of Paraná , Curitiba , PR , Brazil
| | - Vander De F Melo
- b Department of Soil Science , Federal University of Paraná , Curitiba , PR , Brazil
| | - Gilberto Abate
- a Department of Chemistry , Federal University of Paraná , Curitiba , PR , Brazil
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Chuntib P, Jakmunee J. Simple flow injection colorimetric system for determination of paraquat in natural water. Talanta 2015; 144:432-8. [DOI: 10.1016/j.talanta.2015.06.066] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 06/17/2015] [Accepted: 06/23/2015] [Indexed: 10/23/2022]
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20
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Chen X, Yang X, Zeng W, Wang J. Dynamic Mass Transfer of Hemoglobin at the Aqueous/Ionic-Liquid Interface Monitored with Liquid Core Optical Waveguide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8379-8385. [PMID: 26169186 DOI: 10.1021/acs.langmuir.5b02031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Protein transfer from aqueous medium into ionic liquid is an important approach for the isolation of proteins of interest from complex biological samples. We hereby report a solid-cladding/liquid-core/liquid-cladding sandwich optical waveguide system for the purpose of monitoring the dynamic mass-transfer behaviors of hemoglobin (Hb) at the aqueous/ionic liquid interface. The optical waveguide system is fabricated by using a hydrophobic IL (1,3-dibutylimidazolium hexafluorophosphate, BBimPF6) as the core, and protein solution as one of the cladding layer. UV-vis spectra are recorded with a CCD spectrophotometer via optical fibers. The recorded spectra suggest that the mass transfer of Hb molecules between the aqueous and ionic liquid media involve accumulation of Hb on the aqueous/IL interface followed by dynamic extraction/transfer of Hb into the ionic liquid phase. A part of Hb molecules remain at the interface even after the accomplishment of the extraction/transfer process. Further investigations indicate that the mass transfer of Hb from aqueous medium into the ionic liquid phase is mainly driven by the coordination interaction between heme group of Hb and the cationic moiety of ionic liquid, for example, imidazolium cation in this particular case. In addition, hydrophobic interactions also contribute to the transfer of Hb.
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Affiliation(s)
- Xuwei Chen
- Research Center for Analytical Sciences, Northeastern University, Heping District, Wenhua Road 3-11, Shenyang 110819, China
| | - Xu Yang
- Research Center for Analytical Sciences, Northeastern University, Heping District, Wenhua Road 3-11, Shenyang 110819, China
| | - Wanying Zeng
- Research Center for Analytical Sciences, Northeastern University, Heping District, Wenhua Road 3-11, Shenyang 110819, China
| | - Jianhua Wang
- Research Center for Analytical Sciences, Northeastern University, Heping District, Wenhua Road 3-11, Shenyang 110819, China
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Electrochemical Behavior of Paraquat on a Highly Ordered Biosensor Based on an Unmodified DNA-3D Gold Nanoparticle Composite and Its Application. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.11.191] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Oh JA, Lee JB, Lee SH, Shin HS. Ultra-trace level determination of diquat and paraquat residues in surface and drinking water using ion-pair liquid chromatography with tandem mass spectrometry: A comparison of direct injection and solid-phase extraction methods. J Sep Sci 2014; 37:2900-10. [DOI: 10.1002/jssc.201400551] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 07/03/2014] [Accepted: 07/18/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Jin-Aa Oh
- Department of Environmental Science; Kongju National University; Kongju Republic of Korea
| | - Jun-Bae Lee
- Geum River Environment Research Center; Okcheon-eup; Chungbuk Republic of Korea
| | - Soo-Hyung Lee
- Geum River Environment Research Center; Okcheon-eup; Chungbuk Republic of Korea
| | - Ho-Sang Shin
- Department of Environmental Education; Kongju National University; Kongju Republic of Korea
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23
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Durán GM, Contento AM, Ríos Á. Use of Cdse/ZnS quantum dots for sensitive detection and quantification of paraquat in water samples. Anal Chim Acta 2013; 801:84-90. [DOI: 10.1016/j.aca.2013.09.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 08/31/2013] [Accepted: 09/03/2013] [Indexed: 01/31/2023]
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Iriel A, Novo JM, Cordon GB, Lagorio MG. Atrazine and Methyl Viologen Effects on Chlorophyll-aFluorescence Revisited-Implications in Photosystems Emission and Ecotoxicity Assessment. Photochem Photobiol 2013; 90:107-12. [DOI: 10.1111/php.12142] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 07/16/2013] [Indexed: 10/26/2022]
Affiliation(s)
- Analia Iriel
- Centro de Estudios Transdisciplinarios del Agua, Facultad de Ciencias Veterinarias; Universidad de Buenos Aires; Buenos Aires Argentina
| | - Johanna M. Novo
- INQUIMAE/ Dpto. de Química Inorgánica, Analítica y Química Física; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires; Ciudad Universitaria; Buenos Aires Argentina
| | - Gabriela B. Cordon
- LART-IFEVA/ Dpto. de Métodos Cuantitativos y Sistemas de Información; Facultad de Agronomía; Universidad de Buenos Aires; Buenos Aires Argentina
| | - María G. Lagorio
- INQUIMAE/ Dpto. de Química Inorgánica, Analítica y Química Física; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires; Ciudad Universitaria; Buenos Aires Argentina
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Yao F, Liu H, Wang G, Du L, Yin X, Fu Y. Determination of paraquat in water samples using a sensitive fluorescent probe titration method. J Environ Sci (China) 2013; 25:1245-1251. [PMID: 24191615 DOI: 10.1016/s1001-0742(12)60124-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Paraquat (PQ), a nonselective herbicide, is non-fluorescent in aqueous solutions. Thus, its determination through direct fluorescent methods is not feasible. The supramolecular inclusion interaction of PQ with cucurbit[7]uril was studied by a fluorescent probe titration method. Significant quenching of the fluorescence intensity of the cucurbit[7]uril-coptisine fluorescent probe was observed with the addition of PQ. A new fluorescent probe titration method with high selectivity and sensitivity at the ng/mL level was developed to determine PQ in aqueous solutions with good precision and accuracy based on the significant quenching of the supramolecular complex fluorescence intensity. The proposed method was successfully used in the determination of PQ in lake water, tap water, well water, and ditch water in an agricultural area, with recoveries of 96.73% to 105.77%. The fluorescence quenching values (deltaF) showed a good linear relationship with PQ concentrations from 1.0 x 10(-8) to 1.2 x 10(-5) mol/L with a detection limit of 3.35 x 10(-9) mol/L. In addition, the interaction models of the supramolecular complexes formed between the host and the guest were established using theoretical calculations. The interaction mechanism between the cucurbit[7]uril and PQ was confirmed by 1H NMR spectroscopy.
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Affiliation(s)
- Feihu Yao
- Analytical and Testing Center Shanxi Normal University, Linfen 041004, China.
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Páscoa RN, Tóth IV, Rangel AO. Review on recent applications of the liquid waveguide capillary cell in flow based analysis techniques to enhance the sensitivity of spectroscopic detection methods. Anal Chim Acta 2012; 739:1-13. [DOI: 10.1016/j.aca.2012.05.058] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 05/29/2012] [Accepted: 05/30/2012] [Indexed: 11/30/2022]
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Abstract
Flow techniques have undoubtedly aroused special interest in relation to many other automatic methodologies of analysis. Ever since segmented flow analysis (SFA) was developed by Skeggs in 1957, flow techniques have been in continuous evolution toward new develop-ments. There is no solid argument in favor of using any particular flow technique separately; rather, substantial advantages can be derived from their combination. Since flow-based methods are nonseparative tools, the advantages of combining flow techniques with separation techniques are noteworthy. High selectivity can be achieved by coupling them with liquid chromatography (LC), gas chromatography (GC), solid-phase extraction (SPE), or capillary electrophoresis (CE). Thus, a detailed description of flow techniques, their evolution, their hyphenation advantages, and a critical comparison between current developed methods exploiting flow techniques aimed at solving present analytical needs are reviewed in this article.
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Affiliation(s)
- Víctor Cerdà
- 1Group of Analytical Chemistry, Automation and Environment, Department of Chemistry, University of the Balearic Islands, Carretera de Valldemossa km 7’5, Palma de Mallorca, Spain
| | - Jessica Avivar
- 1Group of Analytical Chemistry, Automation and Environment, Department of Chemistry, University of the Balearic Islands, Carretera de Valldemossa km 7’5, Palma de Mallorca, Spain
| | - Amalia Cerdà
- 1Group of Analytical Chemistry, Automation and Environment, Department of Chemistry, University of the Balearic Islands, Carretera de Valldemossa km 7’5, Palma de Mallorca, Spain
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