Trace determination of imidacloprid and its major metabolites in wheat-soil system

文献类型： 外文期刊

第一作者： Liu, Jiayue

作者： Liu, Jiayue;Zheng, Yongquan;Liu, Jiayue;Zhang, Yunhui;Dong, Fengshou;Wu, Xiaohu;Pan, Xinglu;Xu, Jun

作者机构：

关键词： imidacloprid; internal standard method; matrix effect; metabolites; wheat

期刊名称：JOURNAL OF SEPARATION SCIENCE （ 影响因子：3.614； 五年影响因子：2.904 ）

ISSN： 1615-9306

年卷期： 2022 年 45 卷 18 期

页码：

收录情况： SCI

摘要： Trace analysis method is a reliable basis for studying the translocation and metabolism of imidacloprid used as an insecticide in wheat, and it clarifies whether biologically active metabolites including residual imidacloprid, have long-lasting insecticidal potency against wheat aphids under seed treatment during the entire growth period. In this study, a highly sensitive analytical method was established to determine the residues of imidacloprid and its six metabolites (5-hydroxy imidacloprid, imidacloprid olefin, imidacloprid guanidine, imidacloprid urea, 6-chloronicotinic acid, and imidacloprid nitrosimine) in wheat-soil systems, such as in wheat leaves, wheat ears, wheat grains, roots, and soil. All the compounds were extracted using an ACN:water (8:2, v/v) mixture and purified by dispersive solid-phase extraction. The average recoveries ranged from 74.4% to 109.5% for all matrices, with intra- and inter-day variations of less than 14.9%. The limit of quantitation was in the range of 0.001-0.005 mg/kg. The method is demonstrated to be sensitive and accurate for monitoring imidacloprid and its metabolites at trace levels during the entire growth period under field conditions.

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