Simultaneous determination of thiacloprid and its five metabolites in vegetables and flowers using QuEChERS combined with HPLC-MS/MS

文献类型： 外文期刊

第一作者： Pan, Shaodong

作者： Pan, Shaodong;Song, Xianpeng;Wang, Dan;Ma, Yajie;Ren, Xiangliang;Hu, Hongyan;Shan, Yongpan;Ma, Xiaoyan;Luo, Junyu;Wu, Changcai;Ma, Yan;Cui, Jinjie;Pan, Shaodong;Ren, Xiangliang;Hu, Hongyan;Ma, Xiaoyan;Luo, Junyu;Wu, Changcai;Ma, Yan;Cui, Jinjie

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关键词： Thiacloprid; metabolites; residue; QuEChERS; HPLC-MS; MS

期刊名称：INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY （ 影响因子：2.6； 五年影响因子：2.5 ）

ISSN： 0306-7319

年卷期： 2023 年

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收录情况： SCI

摘要： Neonicotinoids have recently been banned in the European Union due to concerns about their environmental safety. Thiacloprid is a neonicotinoid, and is frequently used in agricultural pest control. However, the lack of quantitative methods for assessing its multiple metabolites has made it difficult to perform a comprehensive safety assessment. Therefore, we established an analytical method for effectively determining thiacloprid and its five metabolites in vegetables and flowers using QuEChERS-HPLC-MS/MS. The samples were extracted with acidified acetonitrile (containing 0.5% acetic acid) and were cleaned with graphitised carbon black (GCB) and octadecylsilane (C-18) before the residue analysis. This method provided linearity ranging from 2-2000 mu g kg(-1), and its linear regression coefficients exceeded 0.995. Limits of Quantitation (LOQs) are achieved at 2 mu g kg(-1)? and Limits of Detection (LODs) ranged from 0.09-0.80 mu g kg(-1). The method was validated on seven matrices spiked at 2, 200, and 2000 mu g kg(-1). Average recoveries ranged from 77-119%, with an intra-day Relative Standard Deviation (RSDr) of 1.5-13.4% and an inter-day Relative Standard Deviation (RSDR) of 0.9-14.4%. This method was used on cucumbers sprayed with thiacloprid and 19 types of flower samples collected from the field, after which thiacloprid and several of its metabolites were detected.

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