The metabolism and dissipation behavior of tolfenpyrad in tea: A comprehensive risk assessment from field to cup

文献类型： 外文期刊

第一作者： Wang, Zihan

作者： Wang, Zihan;Luo, Fengjian;Guo, Mingming;Yu, Jiawei;Zhou, Li;Zhang, Xinzhong;Sun, Hezhi;Yang, Mei;Lou, Zhengyun;Chen, Zongmao;Wang, Xinru;Luo, Fengjian;Zhou, Li;Zhang, Xinzhong;Sun, Hezhi;Yang, Mei;Lou, Zhengyun;Chen, Zongmao;Wang, Xinru;Wang, Xinru

作者机构：

关键词： Pesticide; Metabolites; Processed food; Beverage

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2023 年 877 卷

页码：

收录情况： SCI

摘要： The metabolites of pesticides usually require rational risk assessment. In the present study, the metabolites of tolfenpyrad (TFP) in tea plants were identified using UPLC-QToF/MS analysis, and the transfer of TFP and its metab-olites from tea bushes to consumption was studied for a comprehensive risk assessment. Four metabolites, PT-CA, PT-OH, OH-T-CA, and CA-T-CA, were identified, and PT-CA and PT-OH were detected along with dissipation of the parent TFP under field conditions. During processing, 3.11-50.00 % of TFP was further eliminated. Both PT-CA and PT-OH presented a downward trend (7.97-57.89 %) during green tea processing but an upward trend (34.48-124.17 %) dur -ing black tea manufacturing. The leaching rate (LR) of PT-CA (63.04-101.03 %) from dry tea to infusion was much higher than that of TFP (3.06-6.14 %). As PT-OH was no longer detected in tea infusions after 1 d of TFP application, TFP and PT-CA were taken into account in the comprehensive risk assessment. The risk quotient (RQ) assessment in-dicated a negligible health risk, but PT-CA posed a greater potential risk than TFP to tea consumers. Therefore, this study provides guidance for rational TFP application and suggests the sum of TFP and PT-CA residues as the maximum residual limit (MRL) in tea.

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