摘要
为评定使用气相色谱(GC)测定黄精中甲胺磷残留量的测量不确定度,本文依据《中华人民共和国药典》通则2341《农药残留测定法》、JJF 1135—2005《化学分析测量不确定度评定》、JJF 1059.1—2012《测量不确定度评定与表示》中的规定及要求,构建了数学模型,并对检测过程中各种不确定度的来源进行分析。结果显示,黄精中甲胺磷含量为0.213 mg/kg,其测量扩展不确定度为0.017 mg/kg(k=2,P=95%)。该方法的测量不确定度主要来自标准曲线拟合和标准溶液配制,贡献率分别为27.7%和37.2%,而由前处理过程中的样品提取液引入的不确定度分量最小,仅占1.1%。本模型可为使用气相色谱法测定农药残留量的不确定度评定提供可靠、准确的参考依据。
To evaluate the measurement uncertainty in the determination of methamidophos residue in polygonati rhizoma by gas chromatography(GC),a mathematical model was established,and the sources of various uncertainties were analyzed in the process of test according to the provisions and requirements in Chinese pharmacopoeia 2341 general chapters'Determination of pesticide residue',JJF 1135—2005'Evaluation of Uncertainty in Chemical Analysis Measurement and JJF 1059.1—2012'Evaluation and Expression of Uncertainty in Measurement.Results showed that the content of methamidophos in polygonati rhizoma was 0.213 mg/kg,and the expanded uncertainty was 0.017 mg/kg(B2,P=95%).The measurement uncertainty was mainly derived from the fitting of calibration curve and preparation of standard solution,accounting for 27.7%and 37.2%,respectively.The lowest uncertainty component was introduced by sample extraction in the process of pretreatment,accounting for only 1.1%.The model could provide a reliable and accurate reference for evaluation of uncertainty in the determination of pesticide residues by GC.
作者
金雅慧
俞华芬
李罗飞
秦丽
JIN Yahui;YU Huafen;LI Luofei;QIN Li(Agricultural Products Quality and Safety Inspection and Monitoring Station of Hangzhou Yuhang District,Hangzhou 311100,China;Fenghua Research Institute of Ningbo University of Technology,Zhejiang Ningbo315500,China)
出处
《现代农药》
CAS
2022年第2期56-61,共6页
MODERN AGROCHEMICALS
基金
宁波工程学院奉化研究院科技项目(FHI-021110)
杭州市科技计划引导项目(20211231Y130,20211231Y131)。
关键词
气相色谱
黄精
甲胺磷
不确定度
gas chromatography
polygonati rhizoma
methamidophos
uncertainty
