光度法测定PET中端羧基的不确定度评定

Uncertainty evaluation of photometric determination of the carboxyl end group in polyester

通过光度滴定法测定PET中端羧基含量的分析,找出影响不确定度的因素,对各因素的不确定度进行评估,从而得出端羧基测定主要受到测定使用的标准滴定溶液的浓度和方法的重复性等方面的不确定度因素影响。

Through the analysis of photometric titration determination of the carboxyl end group content in polyester, the factors that had effect on the uncertainty were fount out. The uncertainty of each factor was evaluated. It was pointed out that the determination used standard titration solution concentration and method repeatability were the main uncertainty factors that had effect on the carboxyl end group determination.