Residue behavior and risk assessment of mixed formulation of imidacloprid and chlorfenapyr in chieh-qua under field conditions

文献类型： 外文期刊

第一作者： Huang, Jian Xiang

作者： Huang, Jian Xiang;Liu, Cong Yun;Lu, Da Hai;Chen, Jia Jia;Deng, Yi Cai;Wang, Fu Hua;Huang, Jian Xiang;Liu, Cong Yun;Lu, Da Hai;Chen, Jia Jia;Deng, Yi Cai;Wang, Fu Hua;Huang, Jian Xiang;Liu, Cong Yun;Lu, Da Hai;Chen, Jia Jia;Deng, Yi Cai;Wang, Fu Hua

作者机构：

关键词： Imidacloprid;Chlorfenapyr;Chieh-qua;Residue;Risk assessment

期刊名称：ENVIRONMENTAL MONITORING AND ASSESSMENT （ 影响因子：2.513； 五年影响因子：2.871 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： A simple and rapid method based on high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was developed for the simultaneous determination of imidacloprid and chlorfenapyr residues in chieh-qua. Field trials were designed to investigate the dissipation and terminal residue behavior of the mixed formulation of imidacloprid and chlorfenapyr in chieh-qua in Guangzhou and Nanning areas. Risk assessment was performed by calculating the risk quotient (RQ) values. The developed analytical method exhibited recoveries of 89.9-110.3 % with relative standard deviations (RSDs) of 2.8-12.5 % at the spiked levels of 0.01, 0.10, and 1.00 mg/kg. The limit of detection (LOD) was 0.003 mg/kg, and the limit of quantification (LOQ) was 0.01 mg/kg for both imidacloprid and chlorfenapyr. It was found that the half-lives of imidacloprid in chiehqua under field conditions were 3.3 and 3.5 days in Guangzhou and Nanning at a dose of 180 g ai/ha, while the half-lives of chlorfenapyr were 3.3 and 2.6 days, respectively. The terminal residues of imidacloprid and chlorfenapyr were from 0.01 to 0.21 mg/kg and from 0.01 to 0.46 mg/kg, respectively. Results of dietary exposure assessment showed that the RQ values were much lower than 1, indicating that the risk of imidacloprid and chlorfenapyr applied in chieh-qua was negligible to human health under recommended dosage and good agricultural practices. The proposed study would provide guidance for safe and reasonable use of imidacloprid and chlorfenapyr in chieh-qua cultivation in China.

分类号： X8

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