摘要
用实例对X射线荧光光谱法测定土壤样品中氯的不确定度进行了评定。测量结果的不确定度由仪器综合稳定性、制样、标准物质、回归工作曲线、重复测量等所引入的不确定度分量组成。在对各个不确定度分量进行量化的基础上,通过合成得到测量结果的标准不确定度,再乘以95%置信概率下的扩展因子2,得到测量结果的扩展不确定度。
The uncertainty of chlorine content in soil samples determined by X-ray fluorescence spectrometry has been evaluated. The uncertainty of measured results mainly comes from integrated stability of the instrument, sample preparation step, standard reference materials used, regression working-curves, repeated measurements, etc. Based on the quantitative analysis of each source, the extended uncertainty of measurement results was ob- tained from standard uncertainty （ synthesis of uncertainties from each source） multiplied by an extended factor of 2 （under confidence probability of 95 % ）.
出处
《岩矿测试》
CAS
CSCD
2006年第3期270-275,共6页
Rock and Mineral Analysis
基金
国家科技基础条件平台项目--全国分析测试体系的建立与完善[FC(03-04年度)-01]
关键词
测量不确定度
X射线荧光光谱
氯
measurement uncertainty
X-ray fluorescence spectrometry
chlorine
