电位滴定法测定过氧化氢溶液中的过氧化氢含量

利用自动电位滴定仪测定过氧化氢溶液中的过氧化氢含量,研究了仪器的最佳操作条件及方法的准确度和精密度.结果表明:采用电位滴定法,在自动电位滴定仪自动找终点、等量滴定及搅拌速率为8 r/s的条件下测定过氧化氢溶液中的过氧化氢含量,其相对误差为0.10％,相对标准偏差为0.39％,测定1个试样耗时为683 s左右;在电位滴定...

Potentiometric titration determination of hydrogen peroxide content in hydrogen peroxide solution

The hydrogen peroxide content in hydrogen peroxide solution was determined by automatic potentiometric titration.The optimum operating conditions of the instrument and the accuracy and precision of the method were studied.The results showed that the relative error was 0.10%,the relative standard deviation 0.39%,and the determination time of one sample about 683 s when the method of potentiometric titration was used to determine the content of hydrogen peroxide in hydrogen peroxide solution using an automatic potentiometric titrator with automatic end point finding and equal titration at a stirring rate of 8 r/s;12 mL potassium permanganate standard titration solution was pre-added before equal titration on the basis of potentiometric titration;and the improved potentiometric titration method for determining hydrogen peroxide content in hydrogen peroxide solution had no significant difference with the determination method of GB/T 1616—2014 Industrial Hydrogen Peroxide in the determination results,but required shorter time about 213 s for one sample,while that of GB/T 1616—2014 Industrial Hydrogen Peroxide took about 900 s.