光电直读光谱分析法测定锡青铜中锡不确定度的评定

Evaluation of uncertainty in the determination of Sn in tin bronze by photoelectric direct reading spectrometry

对直读光谱法测定锡青铜中锡的不确定度分项进行了评估,影响测量结果的主要不确定分量为:校准工作曲线的不确定度、标样定值的不确定度及测量随机性的不确定度.控制影响不确定度的主要因素,可以减少测量不确定度,保证分析结果的准确性.该法也适合其他元素不确定度的评定.

The uncertainty in the determination of Sn in tin bronze was evaluated by Photoelectric Direct Reading Spectrometry. The uncertainties including calibration curve, standard value, and randomicity of measurement have a great influence on the determination. Therefore,controlling the above factors can effectively reduce the measurement uncertainty and make the analytical results more accurate. This method is also suitable for the evaluation of uncertainty in the determination of other elements.