核化学与放射化学Issue(2)：84-88,5.DOI:10.7538/hhx.2015.37.02.0084
电位滴定法测定基准 U3 O8中铀的不确定度评定
Uncertainty Evaluation for Determination of Total Uranium in Primary Reference Material U3 O8 by Potentiometric Titration
吴青龙 1卞敏 1李英秋 1柏云1
作者信息
- 1. 中国工程物理研究院，四川 绵阳 621900
- 折叠
摘要
Abstract
The determination of total uranium in primary reference material U3 O8 by poten-tiometric titration method was discussed.A mathematical model of measurement component was established to compare the uncertainty factors during measurement process.It was found that the uncertainty of quantity of samples has maximal contribution,the uncertainties of measurement repeatability and quantity of consumed potassium dichromate are in the second place,and the effect of K2 Cr2 O7 relative molecular mass and U relative atomic mass to the final uncertainty factors is minimum.The results show that,when potentiometric titration method is used to determine total uranium in U3 O8 ,an expanded uncertainty of 0.022%(k =2)is recorded at total uranium of 84.795%.关键词
不确定度评定/基准U3O8/电位滴定法/铀总量Key words
uncertainty evaluation/primary reference material U3 O8/potentiometric titra-tion/total uranium分类
能源科技引用本文复制引用
吴青龙,卞敏,李英秋,柏云..电位滴定法测定基准 U3 O8中铀的不确定度评定[J].核化学与放射化学,2015,(2):84-88,5.
