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Dissipation Behavior and Dietary Risk Assessment of Thiamethoxam, Pyraclostrobin, and Their Metabolites in Home-Style Pickled Cowpea

文献类型： 外文期刊

作者： Wang, Xumi 1 ; Wu, Huanqi 1 ; Yang, Kongtan 2 ; Fang, Nan 2 ; Wen, Hong 2 ; Zhang, Changpeng 2 ; Wang, Xiangyun 2 ; Pan, Daodong 1 ;

作者机构： 1.Ningbo Univ, Coll Food & Pharmaceut Sci, Ningbo 315211, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Agroprod Safety & Nutr, State Key Lab Managing Biot & Chem Threats Qual &, Key Lab Pesticide Residue Detect,Minist Agr & Rura, Hangzhou 310021, Peoples R China

3.Jilin Agr Univ, Coll Plant Protect, Changchun 130118, Peoples R China

关键词： pickled cowpea; pesticide; metabolite; dissipation; degradation

期刊名称：FOODS （ 影响因子：5.2； 五年影响因子：5.5 ）

ISSN：

年卷期： 2023 年 12 卷 18 期

页码：

收录情况： SCI

摘要： In this study, the fate of two pesticides commonly used on cowpeas, thiamethoxam and pyraclostrobin, during the preparation of home-made pickled cowpeas was investigated using an improved QuEChERS method combined with UHPLC-MS/MS. Although pesticide residues were primarily distributed on cowpea samples, some were transferred to brine. The dissipation half-life of thiamethoxam on cowpea samples was significantly shorter than that of pyraclostrobin due to thiamethoxam's higher water solubility. Thiamethoxam demonstrated a half-life of 5.12 & PLUSMN; 0.66 days, whereas pyraclostrobin exhibited a longer half-life of 71.46 & PLUSMN; 7.87 days. In addition, the degradation half-lives of these two pesticides in the whole system (cowpea and brine) were 45.01 & PLUSMN; 4.99 and 70.51 & PLUSMN; 5.91 days, respectively. This result indicates that the pickling did not effectively promote the degradation of thiamethoxam and pyraclostrobin. The metabolite clothianidin of thiamethoxam was not produced throughout the pickling process, but the metabolite BF 500-3 of pyraclostrobin was detected in cowpea samples. The detection rates for thiamethoxam, pyraclostrobin, and BF 500-3 in the 20 market samples were 10%, 70%, and 45%, respectively. However, the risk quotient analysis indicated that the risk of dietary intake of thiamethoxam and pyraclostrobin in pickled cowpeas by Chinese consumers was negligible.

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