溴酸钾滴定法测定铜精矿中砷量的不确定度评定

Evaluation of Uncertainty in Determination of Arsenic in Concentrate by Potassium Bromate Titration

文章根据溴酸钾滴定法测定铜精矿中砷量测定方法,对其测定过程的蒸馏、标准滴定溶液浓度、原子量、样品称量及溶解、器具、环境、滴定、重复性等影响分量进行评定,评定出合成不确定度、扩展不确定度,并明确出主要、次要不确定度分量,有利于提升测定质量,提高分析结果准确性。

In this paper,according to the national standard(GB/T3884.9-2012)potassium bromate titration method for the determination of arsenic in copper concentrate,the determination process of distillation,st andard titration solution concentrat ion,atomic weight,sample weighing and dissolution,apparatus,environment,titration,repeatability and other influential components were evaluated,and the synthetic uncertainty and ext ended uncertainty were evaluated.The main and secondary uncertainty components are clearly clarified,which is conducive to improving the measurement quality and improving the accuracy of analysis results.