利用重复性和再现性的估计值评估测量不确定度

摘要

利用标准分析方法重复性、再现性的估计值,对EDTA容量法测定铜铅锌矿石中铅含量的结果进行不确定度评定,检验了参与协作试验的7个实验室偏倚分量的显著性及方法的重复性,当协作试验实验室偏倚及方法精密度处于控制范围时,测量不确定度主要与方法的再现性有关.为按相关标准进行协同试验建立的标准测试方法,提供了一种经济有效的测量不确定度评定方法.%Repeatability and reproducibility estimates of standard analysis were used to determine the uncertainty for lead content in copper, lead and zinc ores, by the EDTA volumetric method. Excesses in laboratory bias and repeatability were examined by 7 different laboratories collaborating for this experiment. It was determined that the measurement uncertainty relates to the accuracy of reproducibility when bias and precision are the dominant factors. This method proved to be efficient and effective by employing standards in collaboration experiments.