Elimination of Pendimethalin in Integrated Rice and Procambarus clarkii Breeding Models and Dietary Risk Assessments

文献类型： 外文期刊

第一作者： Yang, Qiuhong

作者： Yang, Qiuhong;Ai, Xiaohui;Dong, Jing;Yang, Yibin;Zhou, Shun;Liu, Yongtao;Xu, Ning;Ai, Xiaohui;Liu, Yongtao

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关键词： pendimethalin; Procambarus clarkii; elimination; residue; dietary risk; assessment

期刊名称：FOODS （ 影响因子：5.561； 五年影响因子：5.94 ）

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年卷期： 2022 年 11 卷 9 期

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收录情况： SCI

摘要： This study investigated elimination of the herbicide pendimethalin using an integrated rice and Procambarus clarkii breeding model of indoor and outdoor (pond culture) exposure tests. The pendimethalin levels in 484 samples from the primary rice and P. clarkii integrated breeding areas in Hubei province were monitored, and dietary risk assessments of pendimethalin were calculated. Pendimethalin was quantified using high-performance liquid chromatography tandem mass spectrometry, and detection levels were linear in the range of 1.0 to 10.0 mu g/L, and peak areas were positively correlated with concentration, with a correlation coefficient of 0.9996. Recoveries ranged from 86.9 to 103.5%, and the limit of quantitation was 2.5 x 10(-4) mu g/L in water, and 1 x 10(-2) mu g/kg in tissues, sediments, and waterweeds. The dissipation rate of pendimethalin in tissues and water followed first-order kinetics, with half-lives of 0.51-5.64 d. In 484 samples taken from aquaculture farms, pendimethalin was detected in 8.67% of the samples at levels in the range of 1.95 to 8.26 mu g/kg in Hubei province from 2018 to 2020. The maximum residue limit of pendimethalin in P. clarkii has not been established in China, but our dietary risk assessments indicated that consumption of P. clarkii from integrated rice farms was acceptable.

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