气相色谱-串联质谱法测定蔬菜中杀螟硫磷的不确定度评估  

Evaluation of Uncertainty in the Determination of Fenitrothion in Vegetables by Gas Chromatography-Tandem Mass Spectrometry

作　　者：陈华鹏 CHEN Huapeng(Shenzhen Yirui Biotechnology Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]深圳市易瑞生物技术股份有限公司,广东深圳518000

出　　处：《食品安全导刊》2024年第13期115-118,共4页China Food Safety Magazine

摘　　要：本文依据《食品安全国家标准植物源性食品中208种农药及其代谢物残留量的测定气相色谱-质谱联用法》(GB 23200.113-2018)中的方法,以杀螟硫磷D_(6)作为内标物,对蔬菜中的杀螟硫磷残留量进行了检测,对测定过程中所产生的不确定度进行评估。结果表明,蔬菜中杀螟硫磷的含量为0.303 mg·kg^(-1),其扩展不确定度为0.017 mg·kg^(-1)(k=2)。影响测量结果不确定度的主要因素为标准溶液的稀释配制、样品测量重复性以及标准曲线拟合。According to the method of GB 23200.113-2018,the residual amount of methanophos in vegetables was detected by using methanophos D_(6) as the internal standard,and the uncertainty caused by the determination process was evaluated.The results showed that the content of thiophos in vegetables was 0.303 mg·kg^(-1),and its extended uncertainty was 0.017 mg·kg^(-1)(k=2).The main factors affecting the uncertainty of measurement results are the dilution preparation of standard solution,the repeatability of sample measurement and the fitting of standard curve.

关 键 词：杀螟硫磷 杀螟硫磷D_(6) 不确定度 

分 类 号：O657.63[理学—分析化学] TS255.7[理学—化学]