ICP-AES法测定千足黄金饰品中银含量的不确定度评估  

Evaluation of Uncertainty for Determination of Silver in Golden Jewelry by ICP-AES

作　　者：张凤霞[1,2] 李桂华[1,2] 程佑法[1,2] 山广祺[1,2] 李婷[1,2] 

机构地区：[1]国家黄金钻石制品质量监督检验中心 [2]山东省计量检测重点实验室山东省计量科学研究院,济南250014

出　　处：《贵金属》2012年第2期63-66,共4页Precious Metals

基　　金：国家质检总局科技计划(质量技术监督)项目(2011QK226);山东省质量技术监督局科研项目(2010KYZ13)资助

摘　　要：建立了电感耦合等离子体-原子发射光谱(ICP-AES)测定千足黄金中银的相应数学模型,对数学模型中各个参数进行不确定度来源分析,分别对A类不确定度(由测量的结果统计分布计算的不确定度)或B类不确定度(基于经验或其他信息的概率分布估计的不确定度)进行评定。对各不确定度分量合成和扩展,得到千足黄金中银质量分数测定的不确定度为507±17.2 mg/kg(k=2),此不确定度的主要来源于标准溶液系列的配制和校准曲线的测定。A mathematic model for evaluating the uncertainty of the determination procedure for silver in golden jewelry by ICP - AES was established. The uncertainty sources for each of the parameters in the model were analyzed. The uncertainties of type A （ based on the calculation of the statistical distribution of the determination results） or type B （based on the estimation by experience and the probability distribu- tion of other information） were evaluated. According to the international general method, the component uncertainties were synthesized and extended. The uncertainty evaluation of silver mass fraction in gold sample is obtained to be 507-17.2 mg/kg（k =2）. The sources of uncertainty mainly come from prepa- ration of standard solution series and measurement of calibration curve.

关 键 词：分析化学 电感耦合等离子体-原子发射光谱法 饰品 银 测量不确定度 

分 类 号：O657.31[理学—分析化学]