ICP-AES法测定乳粉中Na的不确定度评估  

Uncertainty Evaluation of Determination of Sodium Content in Milk Powder by ICP-AES

作　　者：方军[1] 张志军[1] 林晨[1] 蔡大川[1] 王李平[1] 钟宇强 

机构地区：[1]中国广州分析测试中心,广东省化学危害应急检测技术重点实验室,广东广州510070

出　　处：《食品研究与开发》2017年第5期169-172,共4页Food Research and Development

基　　金：广东省省级科技计划项目(2013B091604003,粤科规财字[2014]208号,2014B070705001)

摘　　要：为了评估电感耦合等离子体发射光谱(ICP-AES)测定乳粉中钠的不确定度。建立了ICP-AES测定乳粉中钠的数学模型,并对不确定度的来源进行了分析和评估,获得了钠含量的测量不确定度。结果表明回收率、重复性和线性是测定不确定度的主要来源。乳粉中钠含量可表示为(465±40)mg/100 g(k=2)。Uncertainty for determination of sodium in milk powder by inductively coupled plasma atomic emis- sion spectrum （ICP-AES） 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 components. The results showed that recovery rate, fitted linear equation for the standard curve and measurement repeatability were the main sources of uncertainties. The sodium content in milk powder was deter- mined to be （465±40）mg/100 g（k=2）.

关 键 词：不确定度 电感耦合等离子体发射光谱 钠 

分 类 号：TS252.7[轻工技术与工程—农产品加工及贮藏工程] O657.31[轻工技术与工程—食品科学与工程]