X射线荧光光谱法测定铝土矿中组分不确定度评估

Uncertainty Evaluation for the Determination of Components in Bauxite Samples by X-Ray Fluorescence Spectrometry

摘要: 本文以X射线荧光光谱法测定铝土矿中Al₂O₃为例，详细论述该方法在分析过程可能产生的不确定来源，并对各分量不确定进行了评定。通过研究可知，X射线荧光光谱法测定铝土矿中Al₂O₃时不确定来源有许多，主要有测量不确定度引入的不确定度、标准样品引入的不确定度、称量误差导致的不确定度等方面，本文通过计算出各分量的不确定度，对各个分量不确定度进行定量分析，最后合成得到测量结果的扩展不确定度。

Abstract: The study discussed the source of uncertainty about measuring the Al₂O₃ of bauxite by X-ray Fluo-rescence Spectrometry in detail; moreover, we assessed the uncertainty of all components possibly. According to the research we could know there were several reasons that caused the uncertainty about measuring the Al₂O₃ by X-ray Fluorescence Spectrometry, such as the method of measurement, standard reference materials, weighing error, etc. The uncertainty of each compo-nent was calculated and analyzed quantitatively; the extended uncertainty of measurement results was obtained from synthesis of each uncertainty source.