直读光谱仪分析铝合金元素不同质量分数不确定度评定  

Uncertainty evaluation of different concentration of aluminium alloy elements by direct reading spectrometer

作　　者：庞海 王家益 谢磊 PANG Hai;WANG Jiayi;XIE Lei(Ningbo Xusheng Group Co.,Ltd.,Ningbo 315000,China)

机构地区：[1]宁波旭升集团股份有限公司,浙江宁波315000

出　　处：《铝加工》2025年第1期52-56,共5页Aluminium Fabrication

摘　　要：通过一个测量实例,详细介绍了测量数据收集、不确定度计算和结果分析的过程,旨在评估直读光谱仪在不同元素质量分数梯度下的不确定度,从而为实际生产中的成分分析提供更加准确的数据。结果表明:人员、环境对测量不确定度的影响较小。标准样品及样品均匀性是合成相对标准不确定度的重要来源。测定元素质量分数不同区间的不确定度为:>0.001%~0.010%,U_(rel)=19%;>0.01%~0.10%,U_(rel)=10%;>0.10%~0.50%,U_(rel)=9%;>0.5%~1.0%,U_(rel)=8%;>1.0%~8.0%,U_(rel)=7%。This paper introduces the process of measurement data collection,uncertainty calculation and the result analysis in detail by a measurement example,aiming at evaluating the uncertainty of direct reading spectrometer under different element content gradients,so as to provide more accurate data for the composition analysis in actual production.The results show that personnel and environment have little influence on measurement uncertainty.Standard sample and sample homogeneity are important sources of relative standard uncertainty in synthesis.The uncertainty of different determination element content intervals is:>0.001%~0.010%,U_(rel)=19%;>0.01%~0.10%,U_(rel)=10%;>0.10%~0.50%,U_(rel)=9%;>0.5%~1.0%,U_(rel)=8%;>1.0%~8.0%,U_(rel)=7%.

关 键 词：不确定度 元素质量分数 标准样品 均匀性 直读光谱仪 

分 类 号：TG115.33[金属学及工艺—物理冶金]