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Enantioselective behaviors of cis-epoxiconazole in vegetables-soil-earthworms system by liquid chromatography-quadrupole-time-of-flight mass spectrometry

文献类型： 外文期刊

作者： Qi, Peipei 1 ; Di, Shanshan 1 ; Cang, Tao 1 ; Yang, Xuewei 1 ; Wang, Xiangyun 1 ; Wang, Zhiwei 1 ; Xu, Hao 1 ; Zhao, Huiy 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, State Key Lab Managing Biot & Chem Threats Qual &, Inst Qual & Stand Agroprod, Hangzhou 310021, Peoples R China

2.Zhejiang Acad Agr Sci, Key Lab Detect Pesticide Residues & Control Zheji, Inst Qual & Stand Agroprod, Hangzhou 310021, Peoples R China

3.Agr Minist, Key Lab Pesticide Residue Det, Hangzhou 310021, Peoples R China

关键词： Cis-epoxiconazole; Enantioselective degradation; Vegetables; Earthworm; LC-Q-TOF/MS

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2020 年 706 卷

页码：

收录情况： SCI

摘要： Cis-epoxiconazole is a widely used triazole fungicide for control and prevention of a series of fungal diseases in fruits, vegetables, was and grains. The present work aimed at exploring enantioselective behavior of cis-epoxiconazole in the vegetable-soil-earthworm system. Firstly, the absolute configuration of as epoxiconazole enantiomers was ascertained. Secondly, enantioselective degradation of as epoxiconazole in cabbage, pakchoi and pepper were performed under field trials, which has not been previously reported. Enantioselective degradation occurred in cabbage and pepper samples. 2R, 3S-(-)-cis-epoxiconazole was degraded faster than 25, 3R-(-)-cis-epoxiconazole in cabbage, while the reversed results were obtained in pepper. No enantioselective degradation was observed in pakchoi. Finally, soil is the principal resell/oft of environmental pesticides, so the enantioselective behaviors of cis-epoxiconazole in soil and soil organism (earthworm, Eisenia fetida) were evaluated. Similar bioaccumulation curves in earthworms and degradation curves in soil were observed under the exposure levels of 1 and 10 mg/kg. Accumulation factors (AFs) indicated earthworms had weak bioaccumulation potential to cis-epoxiconazole in the contaminated soil, and no obvious enantioselectivity was observed. The different enantioselectivities in different vegetables illuminated that preferentially enriched enantiomer might impose higher risk on human health than the other one, and the high risk enantiomer required further assessment. These results may reduce the uncertainty of cis-epoxiconazole to the environmental risk assessment. (C) 2019 Elsevier BM. All rights reserved.

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