氢化物发生-原子荧光法测定高温合金中痕量铋的测量不确定度评定

Uncertainty Evaluation of the Determination of Bismuth in Super Alloys by Hydride Generation–Atomic Fluorescence Spectrometry

介绍氢化物发生–原子荧光光谱法(HG–AFS)测定高温合金中痕量铋(Bi)的不确定度评定方法,建立了数学模型,分析了测量过程中不确定度的来源,并对不确定度分量进行了量化。当高温合金中铋含量为0.00016%时,扩展不确定度为0.00002%(k=2)。

Uncertainty evaluation of measurement of bismuth in super alloys by hydride generation-atomic fluorescence spectrometry （HG-AFS） was introuduced. The mathematical model of uncertaint：l was established, the sources of measurement uncertainty were analyzed and calculated. The expanded uncertainty was 0.000 02%（k=-2） as bismuth content in the super alloy was 0.000 16%.