Dispersive solid-phase extraction combined with dispersive liquid-liquid microextraction for simultaneous determination of seven succinate dehydrogenase inhibitor fungicides in watermelon by ultra high performance liquid chromatography with tandem mass spectrometry

文献类型： 外文期刊

第一作者： Wu, Junxue

作者： Wu, Junxue;Zhi, Shenwei;Jia, Chunhong;Zhu, Xiaodan;Zhao, Ercheng;Zhi, Shenwei;Li, Xinghai

作者机构：

关键词： dispersive liquid-liquid mixroextraction; dispersive solid phase extraction; succinate dehydrogenase inhibitor fungicides

期刊名称：JOURNAL OF SEPARATION SCIENCE （ 影响因子：3.645； 五年影响因子：2.943 ）

ISSN： 1615-9306

年卷期： 2019 年 42 卷 24 期

页码：

收录情况： SCI

摘要： In this study, a simple and accurate sample preparation method based on dispersive solid-phase extraction and dispersive liquid-liquid microextraction has been developed for the determination of seven novel succinate dehydrogenase inhibitor fungicides (isopyrazam, fluopyram, pydiflumetofen, boscalid, penthiopyrad, fluxapyroxad, and thifluzamide) in watermelon. The watermelon samples were extracted with acetonitrile, cleaned up by dispersive solid-phase extraction procedure using primary secondary amine, extracted and concentrated by the dispersive liquid-liquid microextraction procedure with 1,1,2,2-tetrachloroethane, and then analyzed by ultra high performance liquid chromatography with tandem mass spectrometry. The main experimental factors affecting the performance of dispersive solid-phase extraction and dispersive liquid-liquid microextraction procedure on extraction efficiency were investigated. The proposed method had a good linearity in the range of 0.1-100 mu g/kg with correlation coefficients (r) of 0.9979-0.9999. The limit of quantification of seven fungicides was 0.1 mu g/kg in the method. The fortified recoveries of seven succinate dehydrogenase inhibitor fungicides at three levels ranged from 72.0 to 111.6% with relative standard deviations of 3.4-14.1% (n = 5). The proposed method was successfully used for the rapid determination of seven succinate dehydrogenase inhibitor fungicides in watermelon.

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