XRF法和ICP-AES法测定TC4钛合金中铝含量的不确定度评定  

Comparasion of Measurement Uncertainty for the Determination of Al in TC4 Titanium Alloy by XRF and ICP-AES

作　　者：周恺[1] 孙宝莲[1] 刘雷雷[1] 董岐 

机构地区：[1]西北有色金属研究院,陕西西安710016

出　　处：《钛工业进展》2015年第3期39-43,共5页Titanium Industry Progress

基　　金：国家标准制定资助项目(20140941-T-610)

摘　　要：对X射线荧光光谱法(XRF)和电感耦合等离子体原子发射光谱法(ICP-AES)测定TC4钛合金中铝含量的不确定度进行系统分析,在得出合成标准不确定度和扩展标准不确定度的同时,对比两种方法测量不确定度的主要来源。结果显示:XRF法的测定结果为5.95%,扩展不确定度为0.15%,最主要的不确定度分量来自标准样品本身;ICPAES法的测定结果为5.98%,扩展不确定度为0.13%,其中,测量重复性和校准曲线回归的不确定度分量对扩展不确定度的贡献最大。综合对比分析,两者定量结果及可靠性一致,均能很好的应用于TC4钛合金中铝含量的测定。The uncertainty in the measurement for Al content in TC4 titanium alloy by X-ray fluorescence spectrometry （XRF） and inductively coupled plasma atomic emission spectrometry （ICP-AES） was analyzed in detail. The combined standard uncertainty and expanded standard uncertainty were calculated, while the main sources of uncertainty were compared in two methods. The analytical result was 5.95% and the expanded uncertainty was 0. 15% in XRF, which was mainly from the uncertainty of the standard samples. The analytical result was 5.98% and the expanded uncertainty was 0. 13% in ICP-AES, the main contributions were measurement repeatability and uncertainty of the calibration curve linear regression. The quantitative results of the two methods were consistent and could well be used to determine the content of Al in TC4 titanium alloy.

关 键 词：TC4钛合金 X射线荧光光谱法 电感耦合等离子体原子发射光谱法 铝 不确定度 

分 类 号：TG115[金属学及工艺—物理冶金]