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采用原子发射光谱法对钼粉中镍量进行了测定,并对其测量结果的不确定度进行了评定。确立被测量和测量方法,识别了各不确定度来源,并着重对测量结果重复性、样品和载体称量、工作曲线拟合过程、被测样品和标准样品中基体含量(文中含量均为质量分数)不一致等引入的不确定度分量进行了分析、计算和评定,合成标准不确定度,计算出扩展不确定度,报告测量结果不确定度。评定结果表明,标准工作曲线拟合过程引入的不确定度对总不确定度有较大的贡献率。
The amount of nickel in molybdenum powder was determined by atomic emission spectrometry, and the uncertainty of the measurement results was evaluated. Establish the measurement and measurement methods, identify the source of each uncertainty, and focus on the reproducibility of the measurement results, sample and vector weighing, curve fitting process, the measured sample and standard sample matrix content (text content are quality Fractional) inconsistencies and other components of the uncertainty introduced by the analysis, calculation and evaluation, synthesis of standard uncertainty, calculate the expansion of uncertainty, uncertainty of the measurement results reported. The evaluation results show that the uncertainty introduced by the standard working curve fitting process has a greater contribution to the total uncertainty.