摘要
为分析50％噻虫嗪水分散粒剂在枸杞上的残留情况,评估其残留量对人体的膳食摄入风险,建立了噻虫嗪及其代谢物噻虫胺在枸杞上的高效液相色谱-串联质谱检测方法,分析枸杞中农药的最终残留量,估算农药慢性摄入风险.结果表明,在0.01～1.0 mg/L的范围内,2种农药的线性关系良好,相关系数大于0.999.在0.01、0.1、1.0 mg/kg 3个添加水平下,平均回收率为80.7％～106.6％,相对标准偏差为1.4％～4.6％.储藏稳定性试验结果表明,冷冻条件下储藏11个月,噻虫嗪和噻虫胺在枸杞中均稳定.中国居民摄入噻虫嗪和噻虫胺的慢性暴露风险分别为16.6％和3.8％,远低于100％,慢性膳食暴露风险低.
Abstract
In order to analyze the pesticide residues of thiamethoxam 50％WG in Lycium barbarum,the dietary intake risk of the residues was evaluated.A HPLC/MS tandem mass spectrometry method was established for the determination of thiamethoxam and its metabolite clothianidin in L.barbarum to analyze the final residues of pesticides in L.barbarum and estimate the risk of chronic ingestion of pesticides.The results showed that in the range of 0.01-1.0 mg/L,the linear relationship between the two pesticides was good,and the correlation coefficient was greater than 0.999.The average recoveries were 80.7％-106.6％and the relative standard deviations were 1.4％-4.6％at three supplemental levels(0.01,0.1 and 1.0 mg/kg).Storage stability test showed that both thiamethoxam and clothianidin were stable in L.barbarum after storage for 11 months.The chronic exposure risk of Chinese residents ingestion of thiamethoxam and clothianidin was 16.6％and 3.8％,respectively,much lower than 100％,indicating a low risk of chronic dietary exposure.
基金项目
2022宁夏回族自治区科技创新领军人才项目(2022GKLRLX09)
宁夏农林科学院农业高质量发展和生态保护科技创新项目(NGSB-2021-5)
维普
万方数据