原子吸收法测定乳粉中钙含量测量结果不确定度评定  

Evaluation of the measurement uncertainty for the determination of calcium using atomic absorption spectrometry

作　　者：其其格[1] 高娃[1] 乌尼尔[1] 满都呼[1] 常建军[1] 宋晓东[1] 

机构地区：[1]内蒙古蒙牛乳业集团股份有限公司,呼和浩特011500

出　　处：《食品安全质量检测学报》2013年第2期484-488,共5页Journal of Food Safety and Quality

基　　金：内蒙古自治区自然科学基金项目(2010ZD06)~~

摘　　要：目的对原子吸收法测定乳粉中钙含量测量结果不确定度进行评定,确保检测结果准确可靠。方法按照测量不确定度评定的通用规则,建立了数学模型,并分析了方法中的不确定度分量及其来源,计算了各分量的不确定度,最后计算检测结果的合成标准不确定度。结果钙含量(8806.92±780.30)mg/kg。结论不确定度主要来源于测量重复性、消化回收率、稀释过程三个方面。Objective The uncertainty of the detection results of calcium using atomic absorption spectrometry has been evaluated,which ensure the detection results accurate and reliable.Methods According to general rule of evaluation of the measurement uncertainty,mathematical model was established and the measurement uncertainty for the determination of calcium using atomic absorption spectrometry was analysed.Finally,combined standard uncertainty of detection results was calculated.Results The content of calcium was 8806.92 ± 780.30 mg/kg.Conclusion Relative standard uncertainty caused by repeatability,digestion recoveries and dilution were the main factors for the determination of calcium using atomic absorption spectrometry.

关 键 词：原子吸收法 不确定度 钙含量 

分 类 号：TS252.7[轻工技术与工程—农产品加工及贮藏工程] O657.3[轻工技术与工程—食品科学与工程]