PMID- 27211669 OWN - NLM STAT- MEDLINE DCOM- 20170210 LR - 20181202 IS - 1873-7072 (Electronic) IS - 0308-8146 (Linking) VI - 210 DP - 2016 Nov 1 TI - Detection of three herbicide, and one metabolite, residues in brown rice and rice straw using various versions of the QuEChERS method and liquid chromatography-tandem mass spectrometry. PG - 442-50 LID - S0308-8146(16)30681-1 [pii] LID - 10.1016/j.foodchem.2016.05.005 [doi] AB - A single-run analytical method was developed to analyze the three herbicides azimsulfuron, bensulfuron-methyl, and mesotrione and its metabolite (4-methylsulfonyl-2-nitrobenzoic acid (MNBA)) in brown rice and rice straw using liquid chromatography-tandem mass spectrometry (LC/MS/MS). Samples extracted using various versions of Quick, Easy, Cheap, Effective, Rugged, and Safe "QuEChERS" (original unbuffered, acetate (AOAC), and citrate (EN) buffered) methods gave poor recoveries of all the tested analytes in both matrices. The extraction efficiency was improved when primary-secondary amine (PSA) sorbent was removed from the purification step, with the best recovery being achieved for EN-QuEChERS, which was subsequently used throughout the study. Overall, a determination coefficients (R(2))⩾0.995 was achieved at matrix-matched calibration curves at various concentration ranges. The recovery rates at three fortification levels (limit of quantification (LOQ), 1/2 maximum residue limit (1/2MRL), and MRL) ranged from 78 to 114.5, with relative standard deviations (RSDs)<18% for all the tested analytes in both matrices. The LOQs for all herbicides were lower than the MRL set by the Ministry of Food and Drug Safety (MFDS), Republic of Korea. Field trials with the recommended, or double the recommended dose, revealed that the herbicides can safely be applied to rice, as no residues were detected in the harvested samples at 110days. CI - Copyright (c) 2016 Elsevier Ltd. All rights reserved. FAU - Lee, Young-Jun AU - Lee YJ AD - Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea. FAU - Rahman, Md Musfiqur AU - Rahman MM AD - Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea. FAU - Abd El-Aty, A M AU - Abd El-Aty AM AD - Department of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Konkuk University, Seoul, Repulic of Korea; Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, 12211 Giza, Egypt. Electronic address: abdelaty44@hotmail.com. FAU - Choi, Jeong-Heui AU - Choi JH AD - Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea. FAU - Chung, Hyung Suk AU - Chung HS AD - Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea. FAU - Kim, Sung-Woo AU - Kim SW AD - Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea. FAU - Abdel-Aty, Azza M AU - Abdel-Aty AM AD - Water Pollution Research Department, National Research Centre, 33 El Bohouth St., Dokki, 12622 Giza, Egypt. FAU - Shin, Ho-Chul AU - Shin HC AD - Department of Veterinary Pharmacology and Toxicology, College of Veterinary Medicine, Konkuk University, Seoul, Repulic of Korea. FAU - Shim, Jae-Han AU - Shim JH AD - Biotechnology Research Institute, College of Agriculture and Life Sciences, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea. Electronic address: jhshim@chonnam.ac.kr. LA - eng PT - Journal Article DEP - 20160502 PL - England TA - Food Chem JT - Food chemistry JID - 7702639 RN - 0 (Herbicides) RN - 0 (Pesticide Residues) SB - IM MH - Chromatography, Liquid/*methods MH - Herbicides/analysis MH - Oryza/*chemistry MH - Pesticide Residues/analysis/*chemistry MH - Tandem Mass Spectrometry/*methods OTO - NOTNLM OT - Herbicides OT - LC/MS/MS OT - QuEChERS OT - Residues OT - Rice OT - Rice straw EDAT- 2016/05/24 06:00 MHDA- 2017/02/12 06:00 CRDT- 2016/05/24 06:00 PHST- 2016/02/16 00:00 [received] PHST- 2016/04/18 00:00 [revised] PHST- 2016/05/01 00:00 [accepted] PHST- 2016/05/24 06:00 [entrez] PHST- 2016/05/24 06:00 [pubmed] PHST- 2017/02/12 06:00 [medline] AID - S0308-8146(16)30681-1 [pii] AID - 10.1016/j.foodchem.2016.05.005 [doi] PST - ppublish SO - Food Chem. 2016 Nov 1;210:442-50. doi: 10.1016/j.foodchem.2016.05.005. Epub 2016 May 2.