原子吸收光谱法测定铜精矿中铅含量的不确定度评定

摘要

The main uncertainty sources of lead in copper concentrate were analyzed by atomic absorp‐tion spectrometry via the establishment of effective mathematical model , and uncertainties of various sources were evaluated. The stanard uncertainty of lead content was 0.024% (lead content ranged 0 .10%-5 .00% ) ,the expanded uncertainty was 0.047% (the confidence probability p=95% and k=2).%建立有效的数学模型，全面分析了原子吸收光谱法测定铜精矿中铅不确定度的主要来源，并系统地评定各因素的不确定度。得到该方法测定铅含量在0.10％～5.00％范围内的标准不确定度为0.024％，取置信概率p＝95％，包含因子k＝2的扩展不确定度为0.047％。