原子吸收分光光度计测定槟榔中钙元素含量的不确定度评定  

Uncertainty evaluation in determination of Ca in Areca by atomic absorption spectrophotometer

作　　者：康志娇 赵志友 袁河 刘佳 夏延斌[3] KANG Zhi-jiao;ZHAO Zhi-you;YUAN He;LIU Jia;XIA Yan-bin(Hunan Areca Processing and Edible Safety Engineering Technology Research Center, Xiangtan, Hunan,411100, China;Hunan Bingzhilang Food Science and Technology Co., Ltd., Xiangtan, Hunan 411100, China;College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, China)

机构地区：[1]湖南省槟榔加工与食用安全工程技术研究中心,湖南湘潭411100 [2]湖南宾之郎食品科技有限公司,湖南湘潭411100 [3]湖南农业大学食品科技学院,湖南长沙410128

出　　处：《食品与机械》2019年第5期107-110,共4页Food and Machinery

基　　金：长株潭国家自主创新示范区专项(编号:2017SK2430);湖南省科技创新计划项目(编号:2017TP2028,2017ZK3138)

摘　　要：为提高测量结果的准确度,依据JJF1059.1-2012《测量不确定度的评定与表示》,对原子吸收分光光度计测定槟榔中Ca元素含量的不确定度进行评价,建立了槟榔中钙元素含量测定的数学模型,并对其不确定度来源进行分析和量化,最终计算出合成不确定度及扩展不确定度。结果表明,标准曲线拟合及原子吸收分光光度计引入的不确定度影响较大,当槟榔中Ca元素的含量为3.16mg/kg时其扩展不确定为0.04mg/kg(k=2,置信区间95%)。In order to improve the accuracy in measurement, the uncertainty of determination of Ca in Areca by atomic absorption spectrophotometer (AAS) was evaluated according to "JJF 1059.1 -2012 Evaluation and Expression of Uncertainty in Measurement".First, a mathematical model of determination of Ca in Areca was established at first.Then, the source of uncertainty was analyzed and the uncertainty components were quantified.Finally, the synthetic uncertainty and expanded uncertainty were calculated.The uncertainties of standard curve fitting and AAS had a greater influence on the expanded uncertainty.When the content of Ca in Areca was 3.16 mg/kg, the expanded uncertainty was 0.04 mg/kg ( k =2, P=95%).

关 键 词：槟榔 钙 不确定度 原子吸收分光光度计 

分 类 号：O657.31[理学—分析化学] TS207.3[理学—化学]