电位滴定法测定 PA6中端氨基和端羧基含量的不确定度评定

摘要

通过电位滴定法测定PA6中端氨基和端羧基含量，分析并找出测定过程中影响不确定度的因素，并对各不确定度分量进行评定。结果表明：标准滴定溶液的浓度和消耗标准滴定溶液的体积所引入的不确定度对总不确定度贡献最大，其次是测量的重复性。%Using the method of potentiometric titration to measure the end amino and the end carboxyl content in PA6,in order to analyze and identify the uncertainty factors affecting the determination process ,and all uncertain-ty components were evaluated. The results showed that uncertainty arising from the concentration of standard titra -tion solution and volume of consumption standard titration solution ,which was the greatest contribution to the total uncertainty ,the second was the repeatability of measurement.