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Dissipation Pattern And Safety Evaluation Of Cartap And Its Metabolites During Tea Planting, Tea Manufacturing And Brewing

文献类型： 外文期刊

作者： Dai, JX; Jiang, CL; Gao, GW; Zhu, L; Chai, YF; Chen, HP; Liu, X

作者机构：

关键词： Tea; Cartap; Metabolites; Dissipation; Maximum Residual Levels

期刊名称： FOOD CHEMISTRY

ISSN： 0308-8146

年卷期： 2020 年 314 卷

页码：

收录情况： JCR（2021版） ; EI（2021版）

摘要： There are few studies for risk assessment of cartap and its metabolites, although cartap is easily transformed into metabolites which could induce higher toxicity. This study aimed to investigate the dissipation pattern of cartap and its metabolites during tea planting, manufacturing and brewing for evaluating the safety of cartap pesticide. Cartap metabolites were identified using Q-Exactive Orbitrap mass spectrometry. Half-lives of cartap in fresh tea leaves ranged from 0.49 to 0.59 days. Cartap decreased rapidly with time, and it was degraded into nereistoxin and cartap monothiol during tea production chain. Cartap monothiol residues dissipated rapidly by 98% in three days during tea planting. Nereistoxin had a longer residual period than cartap and it dominated the total residue in made tea after tea manufacturing. Transfer rates of nereistoxin during tea brewing ranged from 78.24% to 121.56%. Therefore, we suggested sum of cartap and nereistoxin residues as maximum residual limits in tea.

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