数字农科院2.0

Residue Dissipation And Dietary Exposure Risk Assessment Of Methoxyfenozide In Cauliflower And Tea Via Modified Quechers Using Uplc/Ms/Ms

文献类型： 外文期刊

作者： Sun, HZ; Zhou, L; Zhang, XZ; Luo, FJ; Yang, M; Wang, XR; Lou, ZY; Chen, ZM

作者机构：

关键词： methoxyfenozide; cauliflower; tea; pesticide residue; dissipation; risk quotient (RQ)

期刊名称： JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE

ISSN： 0022-5142

年卷期： 2020 年 100 卷 6 期

页码：

收录情况： JCR（2021版）

摘要： BACKGROUND Methoxyfenozide possesses efficacy against a variety of lepidopteron pests, including the major pests in cauliflower and tea, so it is of great importance to generalize the practical use of methoxyfenozide in the field. RESULTS An efficient method was developed and validated in both vegetable matrix and extract-rich matrix (cauliflower and tea) using modified QuEChERS combined with UPLC/MS/MS analysis. The recoveries in cauliflower, made tea and tea shoots ranged from 94.5 to 108.0%, from 85.0 to 91.6% and from 77.3 to 82.0% respectively, with relative standard deviations (RSDs) below 17.3% in all cases. The field results showed that methoxyfenozide dissipated in cauliflower with half-life (t(1/2)) at 2.5-3.5 days and in tea with t(1/2) at 1.2 days. Combining the above experimental data and statistical food intake values, the risk quotient (RQ) values were significantly lower than 1. CONCLUSION The quantification method of methoxyfenozide in cauliflower or tea has not been established until this study. The dissipation and dietary exposure risk assessment of methoxyfenozide in cauliflower and tea were investigated in the field. Methoxyfenozide dissipated rapidly in cauliflower despite different climates, and it dissipated faster in tea. The dietary risk of methoxyfenozide through cauliflower or tea was negligible to humans. This study not only provides guidance for the safe use of methoxyfenozide but also serves as a reference for the establishment of maximum residue limits (MRLs) in China. (c) 2019 Society of Chemical Industry

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