Simultaneous determination of three pesticides and their metabolites in unprocessed foods using ultraperformance liquid chromatography-tandem mass spectrometry

文献类型： 外文期刊

第一作者： Wu, Xiaohu

作者： Wu, Xiaohu;Xu, Jun;Dong, Fengshou;Liu, Xingang;Pan, Xinglu;Du, Pengqiang;Wei, Dongmei;Zheng, Yongquan;Rong, Lili;Zheng, Yongquan

作者机构：

关键词： Pesticides;metabolites;residue;QuEChERS;UPLC-MS/MS;unprocessed food

期刊名称：FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT （ 影响因子：3.057； 五年影响因子：2.96 ）

ISSN： 1944-0049

年卷期： 2018 年 35 卷 2 期

页码：

收录情况： SCI

摘要： We have developed a rapid, multi-compound analytical method for measuring residues of the pesticides thiamethoxam and its metabolite, clothianidin; fipronil and its three metabolites, fipronil sulfone, fipronil sulfide, and fipronil desulfinyl; and pyraclostrobin in unprocessed foods (rice, corn, cucumbers, tomatoes, apples, and bananas) by ultra-performance liquid chromatography coupled to tandem mass spectrometry. Acetonitrile was used as the extraction solvent, and an octadecylsilane-dispersive SPE was used to clean up the analytes, which were then separated through a UPLC HSS T3 column connected to a tandem mass spectrometer via an electrospray ionisation source. The linearity of this method for the target analytes was excellent (R-2 >= 0.990) in the concentration range of 5-1000 mu g kg(-1). The average recoveries of the seven compounds at concentrations of 10, 100, and 1000 mu g kg(-1) from six spiked matrix samples ranged from 73.6 to 110.6%, all with RSD values of <= 19.7%. The limit of quantification was 10 mu g kg(-1). The method validated the effectiveness of the method for routine monitoring the residue of these pesticides and their metabolites in foods.

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