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Dissipation Dynamic and Final Residues of Oxadiargyl in Paddy Fields Using High-Performance Liquid Chromatography-Tandem Mass Spectrometry Coupled with Modified QuEChERS Method.
Int J Environ Res Public Health. 2018 08 07; 15(8)IJ

Abstract

Oxadiargyl, which binds to the protoporphyrinogen oxidase IX to exhibit herbicide activity, is mainly used in the prevention of certain perennial broadleaved and grass weeds during the preemergence of rice in paddy fields. However, oxadiargyl affects the germination and seedling growth of rice, causing damage to the plant and reducing rice yield. Hence, monitoring fate and behaviour of oxadiargyl in rice paddy fields is of great significance. A modified quick, easy, cheap, effective, rugged, and safe (QuEChERS) sample preparation method coupled with high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was established in paddy water, paddy soil, rice straw, paddy hull, and brown rice. We validated this method for the first time in the analysis of the dissipation dynamic and residues of oxadiargyl over two years (2015⁻2016) at three sites in China. The average recoveries of oxadiargyl ranged from 76.0 to 98.8%, with relative standard deviations of 3.5⁻14.0%. The dissipation curves for paddy soil fit to a first-order kinetic equation, revealing that oxadiargyl degraded rapidly in paddy soil with half-lives (t1/2) of 4.5⁻7.6 days. The final oxadiargyl residues in all samples remained below the detection limit and the maximum residue limit in China (0.02 mg kg-1) and Japan (0.05 mg kg-1) during the harvesting dates and were not detected in rice straw.

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Authors+Show Affiliations

Deng X
Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China. chemdxl@163.com.
Zhou Y
Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China. qimiaobuchugan@126.com.
Zheng W
Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China. zhengwenna1994@163.com. Long Ping Branch, Graduate School of Hunan University, Changsha 410125, China. zhengwenna1994@163.com.
Bai L
Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China. bailianyang2005@aliyun.com. Long Ping Branch, Graduate School of Hunan University, Changsha 410125, China. bailianyang2005@aliyun.com.
Zhou X
Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China. zhouxm1972@126.com. Long Ping Branch, Graduate School of Hunan University, Changsha 410125, China. zhouxm1972@126.com.

MeSH

ChinaChromatography, High Pressure LiquidCrop ProductionHalf-LifeHerbicidesJapanOryzaOxadiazolesPesticide ResiduesSoil PollutantsTandem Mass Spectrometry

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

30087273

Citation

Deng, Xile, et al. "Dissipation Dynamic and Final Residues of Oxadiargyl in Paddy Fields Using High-Performance Liquid Chromatography-Tandem Mass Spectrometry Coupled With Modified QuEChERS Method." International Journal of Environmental Research and Public Health, vol. 15, no. 8, 2018.
Deng X, Zhou Y, Zheng W, et al. Dissipation Dynamic and Final Residues of Oxadiargyl in Paddy Fields Using High-Performance Liquid Chromatography-Tandem Mass Spectrometry Coupled with Modified QuEChERS Method. Int J Environ Res Public Health. 2018;15(8).
Deng, X., Zhou, Y., Zheng, W., Bai, L., & Zhou, X. (2018). Dissipation Dynamic and Final Residues of Oxadiargyl in Paddy Fields Using High-Performance Liquid Chromatography-Tandem Mass Spectrometry Coupled with Modified QuEChERS Method. International Journal of Environmental Research and Public Health, 15(8). https://doi.org/10.3390/ijerph15081680
Deng X, et al. Dissipation Dynamic and Final Residues of Oxadiargyl in Paddy Fields Using High-Performance Liquid Chromatography-Tandem Mass Spectrometry Coupled With Modified QuEChERS Method. Int J Environ Res Public Health. 2018 08 7;15(8) PubMed PMID: 30087273.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dissipation Dynamic and Final Residues of Oxadiargyl in Paddy Fields Using High-Performance Liquid Chromatography-Tandem Mass Spectrometry Coupled with Modified QuEChERS Method. AU - Deng,Xile, AU - Zhou,Yong, AU - Zheng,Wenna, AU - Bai,Lianyang, AU - Zhou,Xiaomao, Y1 - 2018/08/07/ PY - 2018/06/12/received PY - 2018/07/30/revised PY - 2018/08/03/accepted PY - 2018/8/9/entrez PY - 2018/8/9/pubmed PY - 2019/1/25/medline KW - HPLC/MS-MS KW - degradation KW - herbicide KW - residues KW - rice JF - International journal of environmental research and public health JO - Int J Environ Res Public Health VL - 15 IS - 8 N2 - Oxadiargyl, which binds to the protoporphyrinogen oxidase IX to exhibit herbicide activity, is mainly used in the prevention of certain perennial broadleaved and grass weeds during the preemergence of rice in paddy fields. However, oxadiargyl affects the germination and seedling growth of rice, causing damage to the plant and reducing rice yield. Hence, monitoring fate and behaviour of oxadiargyl in rice paddy fields is of great significance. A modified quick, easy, cheap, effective, rugged, and safe (QuEChERS) sample preparation method coupled with high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was established in paddy water, paddy soil, rice straw, paddy hull, and brown rice. We validated this method for the first time in the analysis of the dissipation dynamic and residues of oxadiargyl over two years (2015⁻2016) at three sites in China. The average recoveries of oxadiargyl ranged from 76.0 to 98.8%, with relative standard deviations of 3.5⁻14.0%. The dissipation curves for paddy soil fit to a first-order kinetic equation, revealing that oxadiargyl degraded rapidly in paddy soil with half-lives (t1/2) of 4.5⁻7.6 days. The final oxadiargyl residues in all samples remained below the detection limit and the maximum residue limit in China (0.02 mg kg-1) and Japan (0.05 mg kg-1) during the harvesting dates and were not detected in rice straw. SN - 1660-4601 UR - https://www.unboundmedicine.com/medline/citation/30087273/Dissipation_Dynamic_and_Final_Residues_of_Oxadiargyl_in_Paddy_Fields_Using_High_Performance_Liquid_Chromatography_Tandem_Mass_Spectrometry_Coupled_with_Modified_QuEChERS_Method_ DB - PRIME DP - Unbound Medicine ER -