气相色谱法测定马铃薯中毒死蜱残留量的不确定度评定  

Evaluation of the Uncertainty in Determining Chlorpyrifos Residue in Potato by Gas Chromatography

作　　者：李少萍[1] 杜志龙[1] 张小燕[1] 卢天齐 杨延辰[1] 陈小娟 LI Shaoping;DU Zhilong;ZHANG Xiaoyan;LU Tianqi;YANG Yanchen;CHEN Xiaojuan(Chinese Academy of Agricultural Mechanization Sciences Group Co.,Ltd.,Beijing 100083,China)

机构地区：[1]中国农业机械化科学研究院集团有限公司,北京100083

出　　处：《中国马铃薯》2022年第6期544-550,共7页Chinese Potato Journal

基　　金：国家马铃薯产业技术体系项目(CARS-09-P28)。

摘　　要：毒死蜱是常被用作果蔬杀虫的农药,经常食用农药残留量超标的食品,会对人体的神经系统造成危害,因此食品中农药残留量的检测十分重要。由于检测过程中存在误差,为提高食品中农药残留量检测的准确度,有效保障食品安全,根据JJF 1059.1—2012《测量不确定度评定与表示》原理方法和NY/T 761—2008《蔬菜和水果中有机磷、有机氯、拟除虫菊酯和氨基甲酸酯类农药多残留的测定》,对马铃薯中毒死蜱的残留量进行了不确定度分析与评定。通过不确定度分析,建立了气相色谱法测定毒死蜱残留量的评定方法,找出了影响毒死蜱的残留量测定过程中不确定度的主要来源为标准曲线拟合引入的不确定度,其次为标准溶液配制过程引入的不确定度。最终得到马铃薯中毒死蜱的含量为:X=(0.012 09±0.002 35)mg/kg,k=2。Chlorpyrifos is often used as a pesticide to kill insects in fruits and vegetables. Having food with excessive pesticide residues will cause harm to the nervous system of the human body. Therefore, the detection of pesticide residues in food is very important. Due to errors in the detection process, in order to improve the accuracy of pesticide residue detection in food and ensure food safety effectively, in this study, based on JJF1059.1-2012 "Measurement Uncertainty Evaluation and Representation" principle and method and NY/T 761-2008 "Pesticide Multiresidue Screen Methods for Determination of Organophosphsphorus Pesticides, Organochlorine Pesticides, Pyrethroid Pesticides and Carbamate Pesticides in Vegetables and Fruits", uncertainty analysis and evaluation of the residues of chlorpyrifos in potato were carried out. Through uncertainty analysis, an evaluation method for the determination of chlorpyrifos residues by gas chromatography was established, and it was found that the main reason of uncertainty in the determination of chlorpyrifos residues was the uncertainty introduced for the standard curve fitting. The second reason was the uncertainty introduced in the standard solution preparation process. The final content of chlorpyrifos in potato was X=(0.012 09 ±0.002 35) mg/kg, k = 2.

关 键 词：气相色谱法 马铃薯 毒死蜱 不确定度 

分 类 号：S532[农业科学—作物学]