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Mitra S, Saran RK, Srivastava S, Rensing C. Pesticides in the environment: Degradation routes, pesticide transformation products and ecotoxicological considerations. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 935:173026. [PMID: 38750741 DOI: 10.1016/j.scitotenv.2024.173026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 04/30/2024] [Accepted: 05/04/2024] [Indexed: 05/26/2024]
Abstract
Among rising environmental concerns, emerging contaminants constitute a variety of different chemicals and biological agents. The composition, residence time in environmental media, chemical interactions, and toxicity of emerging contaminants are not fully known, and hence, their regulation becomes problematic. Some of the important groups of emerging contaminants are pesticides and pesticide transformation products (PTPs), which present a considerable obstacle to maintaining and preserving ecosystem health. This review article aims to thoroughly comprehend the occurrence, fate, and ecotoxicological importance of pesticide transformation products (PTPs). The paper provides an overview of pesticides and PTPs as contaminants of emerging concern and discusses the modes of degradation of pesticides, their properties and associated risks. The degradation of pesticides, however, does not lead to complete destruction but can instead lead to the generation of PTPs. The review discusses the properties and toxicity of PTPs and presents the methods available for their detection. Moreover, the present study examines the existing regulatory framework and suggests the need for the development of new technologies for easy, routine detection of PTPs to regulate them effectively in the environment.
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Affiliation(s)
- Suchitra Mitra
- Indian Institute of Science Education and Research, Kolkata 741245, WB, India
| | - R K Saran
- Department of Microbiology, Maharaja Ganga Singh University, Bikaner, Rajasthan, India
| | - Sudhakar Srivastava
- Plant Stress Biology Laboratory, Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi 221005, UP, India.
| | - Christopher Rensing
- Institute of Environmental Microbiology, College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, China
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Costa LS, Schettino CF, Sicupira LC, de Pinho GP, Silvério FO. Determining pyroxasulfone herbicide in honey samples using liquid-liquid extraction with low temperature purification (LLE-LTP). Talanta 2024; 273:125870. [PMID: 38460423 DOI: 10.1016/j.talanta.2024.125870] [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: 11/01/2023] [Revised: 02/29/2024] [Accepted: 03/01/2024] [Indexed: 03/11/2024]
Abstract
Pyroxasulfone is a selective, systemic, pre-emergence herbicide which acts to inhibit weeds in potato, coffee, sugar cane, eucalyptus, and soybean plantations, among others. This active ingredient was classified by Brazilian legislation as a very dangerous product for the environment, and to date there are no studies involving the development of extraction methods for monitoring this compound in environmental matrices. Therefore, the objective of this study was to optimize and validate liquid-liquid extraction with low temperature purification followed by a gas chromatography coupled to mass spectrometry analysis to determine this herbicide in honey samples. The results showed that the best extractor phase was acetonitrile and ethyl acetate (6.5 mL:1.5 mL), with recovery rates close to 100% and relative standard deviations below 11%. The validation proved that the extraction method was selective, precise, accurate and linear in the range of 3-225 μg kg-1, reaching a limit of quantification of 3 μg kg-1, with a -25.95% matrix effect. Monitoring on real samples did not reveal episodes of environmental contamination with pyroxasulfone residue.
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Affiliation(s)
- Luma Soares Costa
- Department of Chemistry, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 39100-000, Diamantina, Minas Gerais, Brazil
| | - Carolina Freitas Schettino
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, 39404-547, Montes Claros, Minas Gerais, Brazil
| | - Lázaro Chaves Sicupira
- Institute of Engineering, Science and Technology, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 39447-790, Janaúba, Minas Gerais, Brazil
| | - Gevany Paulino de Pinho
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, 39404-547, Montes Claros, Minas Gerais, Brazil
| | - Flaviano Oliveira Silvério
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, 39404-547, Montes Claros, Minas Gerais, Brazil.
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de Jesus JR, Alfredo LHM, de Carvalho JP, de Jesus CBR, Moreira Novaes FJ, de Queiroz MELR, Garcia PDT. Greener production of a starch-based nanohybrid material (core-shell) for the simultaneous extraction of persistent organic pollutants in shrimp samples. J Chromatogr A 2023; 1711:464466. [PMID: 37897923 DOI: 10.1016/j.chroma.2023.464466] [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: 06/01/2023] [Revised: 10/05/2023] [Accepted: 10/17/2023] [Indexed: 10/30/2023]
Abstract
Here, a novel nanohybrid material (Ag@CD@ANS) based on oat starch was produced, characterized, and applied to extract persistent organic pollutants in a shrimp sample. By the characterization experiments, Ag@CD@ANS was successfully synthesized. The functionalization of the material by 1,2-naphthoquinone-4-sulphonic acid (ANS) was confirmed using the infrared technique and CHN elemental analysis. The isotherm study showed that the material has a high adsorption capacity for the pesticides of interest (flutriafol, atrazine, heptachlor, DDT and bifenthrin) allowing their extraction from shrimp samples. The optimal condition for extraction was obtained using multivariate analysis. The nature of the elution solvent (hexane, methanol, acetonitrile) and the mass ratio between sample:adsorbent (1:1; 1:5 and 1:10) were the evaluated factors for extraction using Ag@CD@ANS and commercial adsorbents (neutral alumina, octadecyl, silica gel). From the multivariate analysis, it was observed that the optimal condition for pesticide extraction using Ag@CD@ANS was reached, using a 1:5 ratio (sample:adsorbent) and acetonitrile (10 mL) as elution solvent. For the commercial adsorbents, the optimal condition for pesticide extraction was reached, using a 1:3 ratio (sample:adsorbent), acetonitrile (10 mL) and neutral alumina as commercial adsorbent. Ag@CD@ANS efficiency was compared with an optimal commercial adsorbent (neutral alumina). No significant difference (p < 0.05) between neutral alumina and Ag@CD@ANS was observed. Recoveries ranging from 75 to 105 % with coefficients of variation ≤ 15 % (n = 3) were obtained using neutral alumina while using Ag@CD@ANS, recoveries ranging from 73 to 102 %, with coefficient of variation ≤ 13 % (n = 3) were obtained for the target pesticides. Limits of detection ranging from 0.5 to 1.0 µg Kg-1 and limits of quantification ranging from 1.6 to 3.3 µg Kg-1 were reached. The results demonstrated that Ag@CD@ANS can alternatively be used as a support for the extraction of persistent organic pollutants, having the advantage of being reusable for up to three cycles.
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Affiliation(s)
- Jemmyson Romário de Jesus
- Research Laboratory in bionanomaterials, LPbio, Department of Chemistry, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil; Department of Chemistry, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.
| | - Lucas Hestevan Malta Alfredo
- Research Laboratory in bionanomaterials, LPbio, Department of Chemistry, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Jéssica Passos de Carvalho
- Research Laboratory in bionanomaterials, LPbio, Department of Chemistry, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | | | | | | | - Paulo de Tarso Garcia
- Faculty of Chemistry, Universidade Federal do Sul e Sudeste do Pará, Marabá, Pará, Brazil
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Asghari Z, Sereshti H, Soltani S, Taghizadeh M, Karami S, Esmaeili Bidhendi M, Rezania S. An alginate-based eutectogel impregnated with polyvinylpyrrolidone/benzoic acid deep eutectic solvent and magnetic carboxylated multiwalled carbon nanotubes: Evaluated as sorbent in green microextraction of pesticides. J Chromatogr B Analyt Technol Biomed Life Sci 2023; 1229:123865. [PMID: 37690386 DOI: 10.1016/j.jchromb.2023.123865] [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: 06/08/2023] [Revised: 08/17/2023] [Accepted: 08/21/2023] [Indexed: 09/12/2023]
Abstract
This article presents the synthesis and application of a novel magnetic eutectogel constituting a polymeric deep eutectic solvent (PDES), carboxylated multiwall carbon nanotube (MWCNT-COOH), and super-dispersible/super-paramagnetic polyvinylpyrrolidone coated-Fe3O4 nanocrystals incorporated in alginate gel. Different methods were used for the characterization of novel polymeric based DES gel including FT-NMR, ATR-FTIR, and SEM were used. The novel DES eutectogel was used for the extraction of pesticides from honey. The modified eutectogel with PDES, MWCNT, and PDES-MWCNT showed 1.8-, 1.4-, and 2.5-fold enhancement in the sorption efficiency under green magnetic micro-solid-phase extraction (MSPE) method before GC-MS analysis. Important factors including the acidity of the samples, adsorption and desorption conditions, and the ionic strength of the preparation solution were investigated. The matrix effect, specificity, the quantification limits (0.023-1.023 μg kg-1), linear dynamic range (0.023-500 µg kg-1 with R2 of 0.9845-0.9986), relative standard deviations (<8.4%), were evaluated. In addition, the method was used to analyze 12 pesticides in four samples of honey. In the spiked concentration range of 0.1 to 10 μg kg-, the obtained recoveries were between 73.2 and 110.8% (RSD% = 8.1%, n = 3).
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Affiliation(s)
- Zeinab Asghari
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Hassan Sereshti
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran.
| | - Sara Soltani
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Massoud Taghizadeh
- Department of Biology, Faculty of Science, Shahed University, Tehran, Iran
| | - Sajad Karami
- Department of Nutrition, Dietetics and Food Sciences, Utah State University, Logan, UT 84322, United States
| | - Mehdi Esmaeili Bidhendi
- School of Environment, College of Engineering, University of Tehran, Tehran 1417614411, Iran
| | - Shahabaldin Rezania
- Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea.
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Ago KA, Kitte SA, Chirfa G, Gure A. Effervescent powder-assisted floating organic solvent-based dispersive liquid-liquid microextraction for determination of organochlorine pesticides in water by GC-MS. Heliyon 2023; 9:e12954. [PMID: 36704271 PMCID: PMC9871210 DOI: 10.1016/j.heliyon.2023.e12954] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
An effervescent powder-assisted floating organic solvent-based dispersive liquid-liquid microextraction was introduced for determination of 13 organochlorine pesticides in water samples. In this method, a less toxic low-density organic solvent was used as extraction solvent. The extraction solvent was dispersed in to the aqueous sample via CO2 bubbles, in-situ generated up on addition of water to a falcon tube containing the mixture of effervescent powder precursors as well as the extraction solvent. Various experimental parameters such as effervescent and its weight fractions, extraction solvent type and its volume, the total mass of effervescent precursors, and the effect of salt were investigated and the optimal conditions were established. Under the optimum conditions, the proposed method exhibited good linearity for all target pesticides with the coefficient of determinations varying from 0.9981 to 0.9997. The limits of detection and quantification were within the range of 0.03-0.24 and 0.26-0.75 μg/L, respectively. The intra- and inter-day precisions which were expressed in terms of the relative standard deviation ranged from 0.33 to 4.47 and 0.51-5.52%, respectively. The enrichment factors and recoveries ranged from 24 to 293 and 76-116%, respectively. The proposed method could be used simple, cheap, fast, and environmentally friendly alternative for analysis of organochlorine pesticides from environmental water and other similar matrices.
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Li M, Wang P, Zhang X, Wang H, Li K, Bai Y. Development of a Modified QuEChERS Method Based on Magnetic Multi-Walled Carbon Nanotubes as a Clean-Up Adsorbent for the Analysis of Heterocyclic Aromatic Amines in Braised Sauce Beef. Foods 2022; 12:foods12010138. [PMID: 36613354 PMCID: PMC9818259 DOI: 10.3390/foods12010138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/18/2022] [Accepted: 12/24/2022] [Indexed: 12/29/2022] Open
Abstract
Heterocyclic aromatic amines (HAAs) generated during the cooking of meats cause adverse effects on human health. The purpose of the current research was to develop a modified QuEChERS (Quick, Easy, Cheap, Effective, Rugged, Safe) method using magnetic multi-walled carbon nanotubes (Fe3O4-MWCNTs) as clean-up adsorbents for the rapid determination of HAAs in braised sauce beef. The significant parameters in extraction and clean-up processes were screened and optimized. Under optimal conditions, the LODs ranged from 3.0 ng/g to 4.2 ng/g. The recoveries (78.5−103.2%) and relative standard deviations RSDs (<4.6%) of five HAAs were obtained. These are in accordance with the validation criteria (recovery in the range of 70−120% with RSD less than 20%). Compared with conventional clean-up adsorbents (PSA or C18), Fe3O4-MWCNTs displayed equivalent or better matrix removal efficiency, while making the pretreatment process easier and more time-saving through magnetic separation. Less usage of adsorbent makes the method possess another advantage of being lower in cost per sample. The method developed was successfully applied to analyze real samples collected from local deli counters, demonstrating Fe3O4-MWCNTs could be considered as an effective alternative adsorbent with great potential in the QuEChERS process.
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Affiliation(s)
- Min Li
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou 450001, China
| | - Pengxiang Wang
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Xu Zhang
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Hongyu Wang
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
| | - Ke Li
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou 450001, China
| | - Yanhong Bai
- College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China
- Henan Key Laboratory of Cold Chain Food Quality and Safety Control, Zhengzhou 450001, China
- Correspondence:
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Pereira de Freitas LV, de Paula Terra G, de Souza Santos S, Sicupira LC, Silvério FO. Optimization and validation of liquid-liquid extraction with low-temperature purification (LLE-LTP) for determining fluopyram fungicide in water samples using HPLC-DAD. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:2945-2952. [PMID: 35861165 DOI: 10.1039/d2ay01004f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Fluopyram is a fungicide and nematicide that belongs to the chemical group of benzamides, which act as succinate dehydrogenase inhibitors (SDHIs) on the mitochondrial respiratory chain of fungi. Despite being well known in several countries, there are few studies involving the optimization and validation of extraction methods for determining fluopyram in water samples. Therefore, this study aimed to optimize and validate liquid-liquid extraction with low-temperature purification (LLE-LTP) to determine fluopyram fungicide in water samples using high-performance liquid chromatography with diode array detection (HPLC-DAD). A two-level full factorial design was employed to optimize LLE-LTP which enabled achieving a recovery rate close to 100% and relative standard deviations (RSD) < 10.0%. The validation showed that the extraction method may be considered selective, precise, accurate, and linear in the range of 6.0 to 200 μg L-1. The LOD and LOQ were 4.0 and 6.0 μg L-1, respectively, proving the efficiency of this method for trace level determination of this fungicide in water samples. LLE-LTP coupled to HLPC-DAD analysis showed a matrix effect of less than 8% and it was applied in monitoring 20 environmental water samples, but no fluopyram residue was detected in the samples.
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Affiliation(s)
- Lucas Victor Pereira de Freitas
- School of Pharmaceutical Sciences of Ribeirão Preto, Universidade de São Paulo, 14040-903, Ribeirão Preto, São Paulo, Brazil
| | - Gleysson de Paula Terra
- Department of Chemistry, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Minas Gerais, Brazil
| | - Silas de Souza Santos
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, 39404-547, Montes Claros, Minas Gerais, Brazil.
| | - Lázaro Chaves Sicupira
- Institute of Engineering, Science and Technology, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 39447-790, Janaúba, Minas Gerais, Brazil
| | - Flaviano Oliveira Silvério
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, 39404-547, Montes Claros, Minas Gerais, Brazil.
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Vieira LHS, Sicupira LC, Cacique AP, Silvério FO. Optimization and validation of LLE-LTP to determine florpyrauxifen-benzyl herbicide in water samples by HPLC-DAD. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2022; 57:697-709. [PMID: 35861013 DOI: 10.1080/03601234.2022.2099202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Florpyrauxifen-benzyl is a systemic herbicide which acts on weeds of common occurrence in rice cultivation areas using flooded or rainfed systems. The Brazilian Health Regulatory Agency (ANVISA) authorized the commercialization of this pesticide, but did not establish guidelines with an extraction and quantification method of residues of this compound as a form of environmental monitoring. Therefore, the present study aimed to optimize and validate the liquid-liquid extraction with low temperature purification (LLE-LTP) to determine florpyrauxifen-benzyl content in water samples by high performance liquid chromatography with diode array detection (HPLC-DAD). The recovery ranged from 95.84 to 105.4% with a relative standard deviation less than 1.5. LLE-LTP was selective, precise, accurate, linear in the range from 4.00 to 150 µg L-1, and the limit of quantification was 4.00 µg L-1. The stability study of the compound in water revealed its degradation in 25 days and DT50 in approximately 5 days. LLE-LTP coupled to HPLC-DAD presented itself as a simple, easy and efficient method of extracting and analyzing it in water samples.
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Affiliation(s)
- Luís H S Vieira
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, Montes Claros, Brazil
| | - Lázaro C Sicupira
- Institute of Engineering, Science and Technology, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Janaúba, Brazil
| | - Ane P Cacique
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, Montes Claros, Brazil
| | - Flaviano O Silvério
- Institute of Agricultural Sciences, Universidade Federal de Minas Gerais, Montes Claros, Brazil
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Application of CFD Numerical Simulation Image Imaging Technology in the Study of Droplet Microfluidic Multiphase Flow Characteristics. CONTRAST MEDIA & MOLECULAR IMAGING 2022; 2022:5851658. [PMID: 35833059 PMCID: PMC9252693 DOI: 10.1155/2022/5851658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 05/28/2022] [Accepted: 06/06/2022] [Indexed: 11/17/2022]
Abstract
In order to study the problem that the flow in the internal channel of the microfluidic chip is different from that of the macroscopic system by the FD numerical simulation image imaging technology. Taking the liquid-liquid extraction of microfluidic chip as the research object, this paper analyzes the theoretical basis, working principle, structural parameters, and the influence of working parameters on the fluid flow of liquid-liquid extraction. The results are as follows: when the inlet velocity of flowing liquid is 10^(-5) m/s, the diffusion efficiency can still be maintained at 95%; the double ψ-type aqueous phase showed laminar flow, the two-phase contact interface increased compared with the bottom flow rate, and the extraction efficiency increased to 98%; the extraction efficiency of double ψ type is higher than that of double Y-type: when the flow velocity ratio increases from v aq : v oil=1 : 2 to v aq : v oil=5 : 1, the extraction efficiency increases to 99.8%; the experimental extraction efficiency is compared with the diffusion efficiency simulated by simulation. The diffusion efficiency of the cross type is 1.05 times that of the extraction efficiency, and that of the cylindrical type is 1.04 times that of the extraction efficiency. In this study, CFD is used to simulate the characteristics of droplet microfluidic multiphase flow, which enriches the theoretical method and research experience of liquid-liquid laminar flow.
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Santos SDS, de Freitas LVP, Sicupira LC, Silvério FO. Simultaneous Determination of Aldrin and Mirex in Honey by Liquid–Liquid Extraction with Low-Temperature Purification combined with GC–MS. FOOD ANAL METHOD 2022. [DOI: 10.1007/s12161-021-02163-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Silva TLR, de Queiroz MELR, de Oliveira AF, Rodrigues AAZ, Neves AA, Vieira PAF, de Queiroz JH, Barbosa VODP. Microextraction technique associated with gas chromatography-mass spectrometry for determining pesticide residues in urine. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2022; 57:165-175. [PMID: 35175180 DOI: 10.1080/03601234.2022.2038505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Urine is one of the biological matrices most used for detecting human contamination, as it is representative and easily obtained via noninvasive sampling. This study proposes a fast, accurate, and ecological method based on liquid-liquid microextraction with low-temperature partition (μLLE/LTP). It was validated to determine nine pesticides (lindane, alachlor, aldrin, chlorpyrifos, dieldrin, endrin, DDT, bifenthrin, and permethrin) in human urine, in association with gas chromatography coupled with mass spectrometry (GC-MS). The technique was optimized through a factorial design. The best conditions for the simultaneous extraction of the analytes comprised the addition of 600 µL of water and 600 µL of acetonitrile (extracting solvent) to a 500-µL urine sample, followed by vortexing for 60 s. By freezing the samples for 4 h, it was possible to extract the pesticides and perform the extract clean-up simultaneously. The parameters selectivity, linearity, limit of detection (LOD), limit of quantification (LOQ), precision, and accuracy were used to appraise the performance of the method. Good values of selectivity and linearity (R2 > 0.990), LOQ (0.39-1.02 μg L-1), accuracy (88-119% recovery), and precision (%CV ≤ 15%) were obtained. The μLLE/LTP-GC-MS method was applied to authentic urine samples collected from volunteers in Southeast Brazil.
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Affiliation(s)
- Thaís L R Silva
- Department of Chemistry, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | | | | | - Alessandra A Z Rodrigues
- Department of Chemistry, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
- Department of Agricultural Engineering, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Antônio Augusto Neves
- Department of Chemistry, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Patrícia A F Vieira
- Department of Nutrition and Health, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - José Humberto de Queiroz
- Department of Biochemistry and Molecular Biology, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
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Attaullah M, Nawaz MA, Ilahi I, Ali H, Jan T, Khwaja S, Hazrat A, Ullah I, Ullah Z, Ullah S, Ahmad B, Ullah R. Honey as a bioindicator of environmental organochlorine insecticides contamination. BRAZ J BIOL 2021; 83:e250373. [PMID: 34550295 DOI: 10.1590/1519-6984.250373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 05/25/2021] [Indexed: 11/22/2022] Open
Abstract
Honey is a suitable matrix for the evaluation of environmental contaminants including organochlorine insecticides. The present study was conducted to evaluate residues of fifteen organochlorine insecticides in honey samples of unifloral and multifloral origins from Dir, Pakistan. Honey samples (5 g each) were extracted with GC grade organic solvents and then subjected to Rotary Evaporator till dryness. The extracts were then mixed with n-Hexane (5 ml) and purified through Column Chromatography. Purified extracts (1μl each) were processed through Gas Chromatograph coupled with Electron Capture Detector (GC-ECD) for identification and quantification of the insecticides. Of the 15 insecticides tested, 46.7% were detected while 53.3% were not detected in the honey samples. Heptachlor was the most prevalent insecticide with a mean level of 0.0018 mg/kg detected in 80% of the samples followed by β-HCH with a mean level of 0.0016 mg/kg detected in 71.4% of the honey samples. Honey samples from Acacia modesta Wall. were 100% positive for Heptachlor with a mean level of 0.0048 mg/kg followed by β-HCH with a mean level of 0.003 mg/kg and frequency of 83.3%. Minimum levels of the tested insecticides were detected in the unifloral honey from Ziziphus jujuba Mill. Methoxychlor, Endosulfan, Endrin and metabolites of DDT were not detected in the studied honey samples. Some of the tested insecticides are banned in Pakistan but are still detected in honey samples indicating their use in the study area. The detected levels of all insecticides were below the Maximum Residue Levels (MRLs) and safe for consumers. However, the levels detected can cause mortality in insect fauna. The use of banned insecticides is one of the main factors responsible for the declining populations of important insect pollinators including honeybees.
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Affiliation(s)
- M Attaullah
- University of Malakand, Department of Zoology, Chakdara, Dir Lower, Pakistan
| | - M A Nawaz
- Shaheed Benazir Bhutto University, Department of Biotechnology, Dir Upper, Pakistan
| | - I Ilahi
- University of Malakand, Department of Zoology, Chakdara, Dir Lower, Pakistan
| | - H Ali
- University of Malakand, Department of Chemistry, Chakdara, Dir Lower, Pakistan
| | - T Jan
- University of Malakand, Department of Botany, Chakdara, Dir Lower, Pakistan
| | - S Khwaja
- Federal Urdu University of Arts, Science and Technology, Department of Zoology, Karachi, Pakistan
| | - A Hazrat
- University of Malakand, Department of Botany, Chakdara, Dir Lower, Pakistan
| | - I Ullah
- University of Malakand, Department of Zoology, Chakdara, Dir Lower, Pakistan
| | - Z Ullah
- University of Malakand, Department of Zoology, Chakdara, Dir Lower, Pakistan
| | - S Ullah
- University of Malakand, Department of Botany, Chakdara, Dir Lower, Pakistan
| | - B Ahmad
- University of Malakand, Department of Zoology, Chakdara, Dir Lower, Pakistan
| | - R Ullah
- Shaheed Benazir Bhutto University, Department of Zoology, Dir Upper, Pakistan
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