数字农科院2.0

Enantioselective Analysis of Triazole Fungicide Myclobutanil in Cucumber and Soil under Different Application Modes by Chiral Liquid Chromatography/Tandem Mass Spectrometry

文献类型： 外文期刊

作者： Cheng, Li;Liu, Xingang;Xu, Jun;Li, Jing;Li, Yuanbo;Kong, Zhiqiang;Zheng, Yongquan;Jian, Qiu

作者机构：

关键词： myclobutanil;enantioselective;application modes;cucumber;soil

期刊名称： JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

ISSN：

年卷期：

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收录情况： SCI

摘要： A sensitive and enantioselective method was developed and validated for the determination of myclobutanil enantiomers by chiral liquid chromatography coupled with tandem mass spectrometry. The separation and determination were performed using reversed-phase chromatography on a Chiralcel OD-RH column, with ACN-water (70/30, v/v) as the mobile phase under isocratic conditions at 0.5 mL/min flow rate. The matrix effect, linearity, precision, accuracy, and stability were evaluated. The proposed method then was successfully applied to the study of enantioselective degradation of rac-myclobutanil in cucumber and soil under different application modes. The results showed that the preferential degradation of (+)-myclobutaniI resulted in an enrichment of the (-)-myclobutanil residue in plant and soil. Moreover, in cucumber, the stereoselective intensity of myclobutanil under root douche treatment was stronger than that under foliar spraying treatment, whereas in soil, the intensity was exactly opposite. The probable reasons underlying these enantioselective effects were also discussed. This study highlighted the importance of examining the fate of both enantiomers in the greenhouse system for the correct use of chiral pesticides.

分类号： R15

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