Residue degradation, transfer and risk assessment of pyriproxyfen and its metabolites from tea garden to cup by ultra performance liquid chromatography tandem mass spectrometry

文献类型： 外文期刊

第一作者： Li, Hongxia

作者： Li, Hongxia;Zhong, Qing;Wang, Min;Luo, Fengjian;Wang, Xinru;Zhou, Li;Zhang, Xinzhong;Li, Hongxia;Zhong, Qing;Wang, Min

作者机构：

关键词： pyriproxyfen; tea; metabolite; processing; risk assessment; maximum residue limit

期刊名称：JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE （ 影响因子：4.125； 五年影响因子：4.096 ）

ISSN： 0022-5142

年卷期： 2022 年 102 卷 10 期

页码：

收录情况： SCI

摘要： BACKGROUND Tea is one of the most popular drinks in the world. The growth of tea plant is inseparable from the control of pesticides on diseases and pests. Pyriproxyfen is used as a pesticide substitute to control insect pests in tea gardens, but little is known about its residue degradation. Here, we performed an integrative study of the degradation and metabolism of pyriproxyfen from the tea garden to the cup. RESULTS The dissipation half-life of pyriproxyfen during tea growth was 2.74 days, and five metabolites PYPAC, PYPA, DPH-Pyr, 5 ''-OH-Pyr, and 4 '-OH-Pyr were generated. The total processing factors for pyriproxyfen in green tea and black tea were 2.41-2.83 and 2.77-3.70, respectively. The residues of pyriproxyfen and its metabolites were affected by different processing steps. The total leaching rates of pyriproxyfen from green tea and black tea into their infusions were 9.8-12.3% and 5.3-13.8%, respectively. The leaching rates of the five metabolites were higher than that of pyriproxyfen and increased the intake risk. CONCLUSION To ensure safe consumption, the recommended maximum residue limit value of pyriproxyfen in tea can be set to 5 mg kg(-1) and the pre-harvest interval can be set to 5 days. (c) 2022 Society of Chemical Industry.

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