原子荧光光谱法测定海产品中锡的不确定度评定  

Uncertaintiy Evaluation in the Measurement of Tin in Seafood with Microwave Digestion-AFS

作　　者：崔颖[1] 倪松[1] 张海滨[1] 肖亚兵[1] CUI Ying NI Song ZHANG Hai-bin XIAO Ya-bing(Tianjin Entry-exit Inspection and Quarantine Bureau, Tianjin 300461, China)

机构地区：[1]天津出入境检验检疫局,天津300461

出　　处：《食品研究与开发》2017年第13期186-189,共4页Food Research and Development

摘　　要：建立原子荧光光谱法测定海产品中锡含量的测量不确定度的测量模型,根据模型分析并计算不确定度各个分量、结果的不确定度以及扩展不确定度。结果表明,引起测量不确定度的最主要来源是测定C值时用最小二乘法拟合标准工作曲线所引入的不确定度。计算得到在海产品中锡含量为0.293 mg/kg时,扩展不确定度为0.288 mg/kg,包含因子k为2。该方法适用于海产品中锡含量的测量不确定度评定。A measurement model was established, the independent uncertainty, standard uncertainty and ex-panded uncertainty coming from analysis procedure were obtained. The major source of the uncertainty was the calibration curve calculated on the basis of the principle of method of least squares when determining C. As tin content in seafood was 0.293 mg/kg, the expanded uncertainty was 0.288 mg/kg and the coverage factor k was 2. This method was suitable for evaluating the uncertainties in the measurement of tin in seafood.

关 键 词：测量不确定度 原子荧光光谱法 锡 海产品 微波消解 

分 类 号：O657.31[理学—分析化学] TS254.7[理学—化学]