Enantioselective Analysis and Degradation Studies of Isocarbophos in Soils by Chiral Liquid Chromatography-Tandem Mass Spectrometry

文献类型: 外文期刊

第一作者: Zhang, Hu

作者: Zhang, Hu;Wang, Xinquan;Wang, Xiangyun;Qian, Mingrong;Xu, Hao;Qi, Peipei;Wang, Qiang;Zhang, Hu;Wang, Minghua;Zhuang, Shulin;Jin, Nuo

作者机构:

关键词: isocarbophos;absolute configuration;enantioselectivity degradation;soil

期刊名称:JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY ( 影响因子:5.279; 五年影响因子:5.269 )

ISSN:

年卷期:

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收录情况: SCI

摘要: An enantioselective method is presented for the determination of isocarbophos in soil by liquid chromatography coupled with tandem mass spectrometry. The pesticide residues in soil samples were extracted with acetonltrile, and complete enantioseparation was obtained on an amylose tris(3,5-dimefhylphenylcarbamate) chiral column using acetonitrile/2 mM ammonium acetate solution containing 0.1% formic acid (60:40, v/v) as the mobile phase. The absolute configuration of isocarbophos enantiomers was determined by the combination of experimental and calculated electronic circular dichroism spectra. The method was utilized to investigate the degradation of isocarbophos in soils (Changchun, Hangzhou, and Zhengzhou) under sterilized or native conditions. Isocarbophos enantiomers were configurationally stable in the selected soils, and the pesticide degradation was not enantioselective in the sterilized condition. The degradation behavior of rac-isocarbophos was different under native conditions, with no enantioselectivity in the Changchun soil and with the S-(+)-isocarbophos enriched in the Hangzhou and Zhengzhou soils.

分类号: R15

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