X射线荧光光谱法测定贵金属含量的不确定度评定

Evaluation of Uncertainty in Determination of Noble Metal Content by X-ray Fluorescence Spectrometry

依据GB/T18043-2013对金项链含金量进行测定,考虑标准物质、测量重复性、样品均匀性、标准曲线线性等因素对X射线荧光光谱法测定贵金属含量的不确定度进行评定,结果表明测量重复性所产生的不确定度所占分量最大。本文采用的评定方法,能够广泛运用到贵金属含量检测。

The gold content of gold necklaces was determined according to GB/T18043-2013,and the uncertainty of the determination of precious metal content by X-ray fluorescence spectrometry was evaluated in consideration of standard materials,measurement repeatability,sample uniformity,and standard curve linearity.Uncertainty due to measurement repeatability has the largest component.The assessment method used in this paper can be widely used for the detection of precious metal content.