摘要
对高锰酸钾法测定H2O2含量的不确定度产生原因进行了分析,对测量过程中的主要不确定度分量进行了评定,包括测量的重复性、标定KMnO4的浓度、滴定时消耗KMnO4溶液的体积、配制H2O2稀溶液、移取H2O2溶液体积等,并得出高锰酸钾法测定H2O2含量的扩展不确定度。发现标定KMnO4溶液及配制H2O2稀溶液引入的不确定度是主要的,而重复测定引入的不确定度影响可忽略。
The uncertainty source in the measurement results for H2O2 by permanganimetric method was analyzed.The main uncertainty components in the determination process were evaluated,including repeatability of determination,the concentration of KMnO4,the consumed volume of KMnO4,the preparation for sample,and consumed volume of H2O2 sample.And the extended uncertainty in the determination of H2O2 was obtained.The results showed that the main uncertainty source is the concentration of KMnO4 and the preparation for sample,the uncertainty from repeatability of determination can neglect.
出处
《广东化工》
CAS
2011年第10期137-138,共2页
Guangdong Chemical Industry
