X射线荧光光谱法测定土壤样品中氯的不确定度评定

Uncertainty Evaluation of Measurement Results for the Determination of Chlorine in Soil Samples by X-ray Fluorescence Spectrometry

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。

Abstract: 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 ma