ICP-AES法测定复合蛋白饮料中钠含量的不确定度评定  

Uncertainty evaluation of determination on sodium content in compound protein beverage by ICP-AES

作　　者：冯歆轶 芦智远 吴正昌[2] 郭松年 

机构地区：[1]西安市产品质量监督检验院,西安710065 [2]陕西省农村信用社联合社,西安710077

出　　处：《粮食与食品工业》2015年第1期93-96,共4页Cereal & Food Industry

基　　金：国家质检总局科技计划项目(项目编号:2013QK149)

摘　　要：本文评价了微波消解-电感耦合等离子体发射光谱法(ICP-AES)测定复合蛋白饮料中钠含量的不确定度。建立ICP-AES测定饮料中钠含量的数学模型,对不确定度来源分析和计算,对各不确定度分量进行合成和扩展,得到钠含量的不确定度。结果表明:测量重复性和标准曲线拟合线性方程引起的不确定度是不确定度的主要来源,复合蛋白饮料中钠含量可表示为(57±1)mg/100 mL(k=2)。Uncertainty for determination of sodium in compound protein beverage by ICPAES with microwave digestion was evaluated. A mathematic model was established by analyzing the uncertainty sources from different parts. The uncertainty of sodium content was calculated by synthesis and extension of each uncertainty component. The results show that the fitted linear equation for the standard curve and the measurement repeatability is the main source of uncertainties. The sodium content in compound protein beverage is determined to be （57 ± 1） mg/100 mL （k = 2）.

关 键 词：微波消解 电感耦合等离子体光谱法 钠 不确定度 

分 类 号：TS207[轻工技术与工程—食品科学]