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

第一作者： Teng, Chunhong

作者： Teng, Chunhong;Li, Ying;Teng, Chunhong;Li, Ying;Cang, Tao;Xu, Hao;Liu, Zhenzhen;Qi, Peipei;Wang, Zhiwei;Zhao, Huiyu;Di, Shanshan;Wang, Xinquan;Cang, Tao;Xu, Hao;Liu, Zhenzhen;Qi, Peipei;Wang, Zhiwei;Zhao, Huiyu;Di, Shanshan;Wang, Xinquan

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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

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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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