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Kabir MH, Abd El-Aty AM, Kim SW, Lee HS, Rahman MM, Lee YJ, Chung HS, Lieu T, Choi JH, Shin HC, Im GJ, Hong SM, Shim JH. Residual determination and risk assessment of buprofezin in plum (Prunus domestica) grown in open-field conditions following the application of three different formulations. Biomed Chromatogr 2016; 30:1721-1727. [PMID: 27106875 DOI: 10.1002/bmc.3745] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/08/2016] [Accepted: 04/13/2016] [Indexed: 11/08/2022]
Abstract
This study was conducted to characterize the residual level and perform a risk assessment on buprofezin formulated as an emulsifiable concentrate, wettable powder, and suspension concentrate over various treatment schedules in plum (Prunus domestica). The samples were extracted with an AOAC quick, easy, cheap, effective, rugged, and safe, 'QuEChERS', method after major modifications. As intrinsic interferences were observed in blank plum samples following dispersive-solid phase extraction (consisting of primary secondary amine and C18 sorbents), amino cartridges were used for solid-phase extraction. Analysis was carried out using liquid chromatography with diode array detection and confirmed by liquid chromatography-tandem mass spectrometry. The method showed excellent linearity with determination coefficient (R2 = 1) and satisfactory recoveries (at two spiking levels, 0.5 and 2.5 mg/kg) between 90.98 and 94.74% with relative standard deviation (RSD) ≤8%. The limit of quantification (0.05 mg/kg) was considerably lower than the maximum residue limit (2 mg/kg) set by the Codex Alimentarius. Absolute residue levels for emulsifiable concentrates were highest, perhaps owing to the dilution rate and adjuvant. Notably, all formulation residues were lower than the maximum residue limit, and safety data proved that the fruits are safe for consumers. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Md Humayun Kabir
- Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Republic of Korea
| | - A M Abd El-Aty
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Konkuk University, Seoul, 143-701, Republic of Korea. , .,Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, 12211 Giza, Egypt. ,
| | - Sung-Woo Kim
- Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Republic of Korea
| | - Han Sol Lee
- Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Republic of Korea
| | - Md Musfiqur Rahman
- Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Republic of Korea
| | - Young-Jun Lee
- Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Republic of Korea
| | - Hyung Suk Chung
- Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Republic of Korea
| | - Truong Lieu
- Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Republic of Korea
| | - Jeong-Heui Choi
- Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Republic of Korea
| | - Ho-Chul Shin
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Konkuk University, Seoul, 143-701, Republic of Korea
| | - Geon-Jae Im
- Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Wanju, 55365, Republic of Korea
| | - Su Myeong Hong
- Department of Agro-food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Wanju, 55365, Republic of Korea
| | - Jae-Han Shim
- Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 300 Yongbong-dong, Buk-gu, Gwangju, 500-757, Republic of Korea.
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Leiva JA, Nkedi-Kizza P, Borejsza-Wysocki WS, Bauder VS, Morgan KT. Imidacloprid Extraction from Citrus Leaves and Analysis by Liquid Chromatography-Mass Spectrometry (HPLC-MS/MS). BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2016; 96:671-677. [PMID: 26988226 DOI: 10.1007/s00128-016-1769-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 03/03/2016] [Indexed: 06/05/2023]
Abstract
A procedure was developed to extract Imidacloprid (IMD) from newly-flushed and fully-expanded citrus leaves. The extraction was conducted in a bullet blender, using a small sample mass (0.5 g of fresh tissue), stainless-steel beads (24 g), and methanol as extractant (10 mL). The extracts did not require further clean-up before analysis by HPLC-MS/MS. The method was validated with control samples from IMD-untreated Hamlin orange trees. The method limit of detection and limit of quantitation were 0.04 and 0.12 μg g(-1), respectively. IMD recoveries from fortified leaf tissue were between 92 % and 102 %, with relative standard deviations of <8 %. The method was further evaluated by extracting leaves from Hamlin orange trees treated with IMD. The treated trees showed maximum concentrations of 10.8 and 21.8 µg g(-1), observed at 20 days after applying two soil-drenching rates (0.51 and 1.02 kg IMD ha(-1)), respectively. This extraction technique will generate useful data on IMD plant uptake, foliar concentration, and correlations with Asian citrus psyllid (ACP) mortality or control. The method could be used to generate baseline data to improve IMD soil-drenching applications as the main management practice to control the ACP.
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Affiliation(s)
- Jorge A Leiva
- Soil and Water Science Department, Institute of Food and Agricultural Sciences (IFAS), University of Florida (UF), P.O. Box 110290, Gainesville, FL, 32611, USA.
| | - Peter Nkedi-Kizza
- Soil and Water Science Department, Institute of Food and Agricultural Sciences (IFAS), University of Florida (UF), P.O. Box 110290, Gainesville, FL, 32611, USA
| | | | - Victor S Bauder
- Food and Environmental Toxicology Laboratory, UF-IFAS, P.O. Box 110720, SW 23rd Drive, Gainesville, FL, 32611, USA
| | - Kelly T Morgan
- Soil and Water Science Department, South West Florida Research and Education Center, UF-IFAS, 2685 SR 29 North, Immokalee, FL, 34142, USA
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Huang JX, Liu CY, Lu DH, Chen JJ, Deng YC, Wang FH. Residue behavior and risk assessment of mixed formulation of imidacloprid and chlorfenapyr in chieh-qua under field conditions. ENVIRONMENTAL MONITORING AND ASSESSMENT 2015; 187:650. [PMID: 26412080 DOI: 10.1007/s10661-015-4846-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 09/04/2015] [Indexed: 06/05/2023]
Abstract
A simple and rapid method based on high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was developed for the simultaneous determination of imidacloprid and chlorfenapyr residues in chieh-qua. Field trials were designed to investigate the dissipation and terminal residue behavior of the mixed formulation of imidacloprid and chlorfenapyr in chieh-qua in Guangzhou and Nanning areas. Risk assessment was performed by calculating the risk quotient (RQ) values. The developed analytical method exhibited recoveries of 89.9-110.3% with relative standard deviations (RSDs) of 2.8-12.5% at the spiked levels of 0.01, 0.10, and 1.00 mg/kg. The limit of detection (LOD) was 0.003 mg/kg, and the limit of quantification (LOQ) was 0.01 mg/kg for both imidacloprid and chlorfenapyr. It was found that the half-lives of imidacloprid in chieh-qua under field conditions were 3.3 and 3.5 days in Guangzhou and Nanning at a dose of 180 g ai/ha, while the half-lives of chlorfenapyr were 3.3 and 2.6 days, respectively. The terminal residues of imidacloprid and chlorfenapyr were from 0.01 to 0.21 mg/kg and from 0.01 to 0.46 mg/kg, respectively. Results of dietary exposure assessment showed that the RQ values were much lower than 1, indicating that the risk of imidacloprid and chlorfenapyr applied in chieh-qua was negligible to human health under recommended dosage and good agricultural practices. The proposed study would provide guidance for safe and reasonable use of imidacloprid and chlorfenapyr in chieh-qua cultivation in China.
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Affiliation(s)
- Jian Xiang Huang
- Public Monitoring Center for Agro-product, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Testing and Evaluation for Agro-product Quality and Safety, Ministry of Agriculture, Guangzhou, 510640, China
- Laboratory of Quality and Safety Risk Assessment for Agro-product (Guangzhou), Ministry of Agriculture, Guangzhou, 510640, China
| | - Cong Yun Liu
- Public Monitoring Center for Agro-product, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Testing and Evaluation for Agro-product Quality and Safety, Ministry of Agriculture, Guangzhou, 510640, China
- Laboratory of Quality and Safety Risk Assessment for Agro-product (Guangzhou), Ministry of Agriculture, Guangzhou, 510640, China
| | - Da Hai Lu
- Public Monitoring Center for Agro-product, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Testing and Evaluation for Agro-product Quality and Safety, Ministry of Agriculture, Guangzhou, 510640, China
- Laboratory of Quality and Safety Risk Assessment for Agro-product (Guangzhou), Ministry of Agriculture, Guangzhou, 510640, China
| | - Jia Jia Chen
- Public Monitoring Center for Agro-product, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Testing and Evaluation for Agro-product Quality and Safety, Ministry of Agriculture, Guangzhou, 510640, China
- Laboratory of Quality and Safety Risk Assessment for Agro-product (Guangzhou), Ministry of Agriculture, Guangzhou, 510640, China
| | - Yi Cai Deng
- Public Monitoring Center for Agro-product, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
- Key Laboratory of Testing and Evaluation for Agro-product Quality and Safety, Ministry of Agriculture, Guangzhou, 510640, China
- Laboratory of Quality and Safety Risk Assessment for Agro-product (Guangzhou), Ministry of Agriculture, Guangzhou, 510640, China
| | - Fu Hua Wang
- Public Monitoring Center for Agro-product, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China.
- Key Laboratory of Testing and Evaluation for Agro-product Quality and Safety, Ministry of Agriculture, Guangzhou, 510640, China.
- Laboratory of Quality and Safety Risk Assessment for Agro-product (Guangzhou), Ministry of Agriculture, Guangzhou, 510640, China.
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Ko AY, Rahman MM, Abd El-Aty AM, Jang J, Park JH, Cho SK, Shim JH. Development of a simple extraction and oxidation procedure for the residue analysis of imidacloprid and its metabolites in lettuce using gas chromatography. Food Chem 2014; 148:402-9. [PMID: 24262575 DOI: 10.1016/j.foodchem.2013.10.055] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 09/21/2013] [Accepted: 10/10/2013] [Indexed: 11/16/2022]
Abstract
Simple extraction and optimised oxidation procedures were developed for the determination of the total residues of imidacloprid and its metabolites (containing the 6-chloropicolyl moiety) in lettuce using a gas chromatography-micro electron capture detector (GC-μECD). Samples were extracted with acetonitrile, and the extract was then evaporated. The remaining residues were dissolved in water and oxidised with potassium permanganate to yield 6-chloronicotinic acid (6-CAN). The acid residues were further dissolved in n-hexane:acetone (8:2, v/v) and then silylated with MSTFA (N-methyl-N-(trimethylsilyl)trifluoroacetamide) to 6-chloronicotinic acid trimethylsilyl ester. Calibration curves were linear over the concentration ranges (0.025-5 μg mL(-1)) with a determination coefficient (r(2)) of 0.991. The limits of detection and quantification were 0.015 and 0.05 mg kg(-1), respectively. Recoveries at two fortification levels ranged between 72.8% and 108.3% with relative standard deviation (RSD) lower than 8%. The method was effective, and sensitive enough to determine the total residues of imidacloprid and its metabolites in field-incurred lettuce samples. The identity of the analyte was confirmed using gas chromatography-tandem mass spectrometry (GC-MS/MS).
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Affiliation(s)
- Ah-Young Ko
- Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonna National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea
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Park JH, Park JS, Abd El-Aty AM, Rahman MM, Na TW, Shim JH. Analysis of imidacloprid and pyrimethanil in shallot (Allium ascalonicum) grown under greenhouse conditions using tandem mass spectrometry: establishment of pre-harvest residue limits. Biomed Chromatogr 2012; 27:451-7. [DOI: 10.1002/bmc.2812] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Accepted: 08/09/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Jong-Hyouk Park
- Natural Products Chemistry Laboratory, Biotechnology Research Institute; Chonnam National University; 77 Yongbong-ro, Buk-gu; Gwangju; 500-757; Republic of Korea
| | | | - A. M. Abd El-Aty
- Department of Pharmacology, Faculty of Veterinary Medicine; Cairo University; 12211-Giza; Egypt
| | - Md. Musfiqur Rahman
- Natural Products Chemistry Laboratory, Biotechnology Research Institute; Chonnam National University; 77 Yongbong-ro, Buk-gu; Gwangju; 500-757; Republic of Korea
| | - Tae-Woong Na
- Natural Products Chemistry Laboratory, Biotechnology Research Institute; Chonnam National University; 77 Yongbong-ro, Buk-gu; Gwangju; 500-757; Republic of Korea
| | - Jae-Han Shim
- Natural Products Chemistry Laboratory, Biotechnology Research Institute; Chonnam National University; 77 Yongbong-ro, Buk-gu; Gwangju; 500-757; Republic of Korea
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Park JY, Choi JH, Abd El-Aty AM, Kim BM, Park JH, Choi WJ, Shim JH. Development and validation of an analytical method for determination of endocrine disruptor, 2,4-D, in paddy field water. Biomed Chromatogr 2010; 25:1018-24. [DOI: 10.1002/bmc.1559] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Accepted: 09/28/2010] [Indexed: 11/12/2022]
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