ICP-MS法测定粉条中铝含量的不确定度评定  

Study of Uncertainty Evaluation for the Determination of Aluminum Content in Vermicelli by Inductively Coupled Plasma-mass Spectrometry(ICP-MS)

作　　者：祝红蕾[1] 宋永庆 ZHU Hong-lei;SONG Yong-qing(Anhui Provincial Supervising & Testing Research Institute for Product Quality, Hefei 230051, China)

机构地区：[1]安徽省产品质量监督检验研究院,安徽合肥230051

出　　处：《安徽化工》2019年第2期117-119,共3页Anhui Chemical Industry

摘　　要：采用电感耦合等离子体质谱法(ICP-MS)测定食品中的铝含量。全面考虑了整个测定过程不确定度来源,对影响结果不确定度的各个因素作了系统分析,建立了结果不确定度评估数学模型,探讨了其测定结果不确定度,并对评估结果进行比较。测定结果的合成不确定度为0.772 2 mg/kg,扩展不确定度为1.54 mg/kg(k=2),粉条中铝含量的测定结果为(70.22±1.54)mg/kg(k=2,P=95%)。本方法对ICP-MS法测定粉条中铝含量结果的不确定度评定具有参考作用。The content of Aluminum in food was determined by inductively coupled plasma-mass spectrometry (ICP-MS). The various factors that affect the uncertainty were systematically analyzed. A mathematical model for uncertainty evaluation was established and used to comparatively evaluate the uncertainties of the analytical method. In this study, the combined standard uncertainty of the measurement results was 0.772 2 mg/kg, and the expanded uncertainty was 1.54 mg/kg (k=2). The final result of Aluminum content in vermicelli was (70.22 ± 1.54) mg/kg (k=2, P=95%). This method has a reference effect on the uncertainty evaluation of the results of the determination of Aluminum in vermicelli by ICP-MS.

关 键 词：电感耦合等离子体质谱法 铝 不确定度 

分 类 号：O657.63[理学—分析化学] TS262.91[理学—化学]