EDXRF测量黄金纯度的不确定度评估  

Evaluation for Measurement Uncertainty of Gold Content by EDXRF

作　　者：张凤霞[1,2] 刘继义 程佑法[1,2] 刘海彬[1,2] 

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

出　　处：《贵金属》2012年第4期68-70,共3页Precious Metals

基　　金：国家质检总局科技计划(质量技术监督)(2011QK226);山东省质量技术监督局科研项目(2010KYZ13;2011KY02)资助

摘　　要：研究了X射线荧光能谱法测定金含量的不确定度来源,探讨了测量不确定度的评定过程与步骤。结果显示,该方法测量结果的不确定度主要与测量系统有关,主要的不确定度分量有标准物质的给定值与误差、仪器的分辨率。计算了各个变量的不确定度,得出了检测结果的合成标准不确定度和扩展不确定度。使测量结果更具有科学性,从而能够规范、定量地进行产品合格判定。A procedure for evaluation of the uncertainty of the measurement results of gold content by EDXRF was developed. The concrete evaluation process was discussed. The results showed that the main factors of uncertainty is related to the measurement system, including the given value and error of the standard sample. Some data were collected in the procedure of analyzing the gold sample and the various uncertainties in measurement were calculated. The combined uncertainty and expanded uncertainty were finally obtained by synthesizing the uncertainties of various component variables. It can make the analytic results more scientific and provid a technical guarantee to evaluation of products qualification.

关 键 词：分析化学 X射线荧光能谱法 金含量 不确定度 评定 

分 类 号：O657.34[理学—分析化学]