Study on the enantioselective bioaccumulation and dissipation of uniconazole enantiomers in earthworm-soil microcosm through supercritical fluid chromatography-tandem mass spectrometry (SFC-MS/MS)
文献类型： 外文期刊
作者： Teng, Chunhong 1 ; Li, Ying 1 ; Cang, Tao 2 ; Xu, Hao 2 ; Liu, Zhenzhen 2 ; Qi, Peipei 2 ; Wang, Zhiwei 2 ; Zhao, Huiyu 2 ; Di, Shanshan 2 ; Wang, Xinquan 2 ;
作者机构： 1.Northeast Agr Univ, Coll Agr, 600 Changjiang Rd, Harbin 150030, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Qual & Stand Agroprod, State Key Lab Managing Biot & Chem Threats Qual &, Key Lab Detect Pesticide Residues & Control Zheji, Hangzhou 310021, Peoples R China
3.Agr Minist, Key Lab Pesticide Residue Detect, Hangzhou 310021, Peoples R China
关键词： Chiral uniconazole; SFC-MS; MS; Earthworm-soil microcosm; Enantioselective bioaccumulation; Enantioselective dissipation
期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：5.19； 五年影响因子：5.053 ）
ISSN： 0944-1344
年卷期：
页码：
收录情况： SCI
摘要： In this work, the enantioselective bioaccumulation and dissipation of uniconazole enantiomers in earthworm-soil microcosm were studied. A fast enantioseparation method of uniconazole through supercritical fluid chromatography-tandem mass spectrometry (SFC-MS/MS) was established. The CHIRALCEL OZ-3 column and a mixture of CO2 and methanol (80:20, v/v) were used within 1.0 min to separate uniconazole enantiomers. The recoveries of uniconazole enantiomers in earthworm and soil samples ranged from 83.3 to 113%, and the intra-day and inter-day relative standard deviation values were lower than 11%. In earthworms, the bioaccumulation concentrations of uniconazole enantiomers increased with time and reached the maximum on the 7th day and then decreased. The elimination of uniconazole enantiomers in earthworms followed the first-order kinetics equation, and the elimination half-lives were approximately 7 days. In artificial soil, the dissipation of uniconazole enantiomers was slow, and the dissipation half-lives were both 25.7 days. No enantioselectivity occurred in the earthworm-soil microcosm. These results may reduce the uncertainty of environmental risk assessment for uniconazole.
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