The content of total tannin was chosen as the assessment index, and the EDTA complexometric titration was used for the measurement.
方法：采用正交实验法对老鹳草总鞣质的提取工艺进行优选，以总鞣质含量为指标，用EDTA络合法滴定。
2
Objective:To explore the affecting factors of benzalkonium bromide content determined value by two phase complexometric titration method.
前言： 目的：探讨双相络和滴定法测定新洁尔灭含量的影响因素。
3
The acidity control problem of de-masking reaction in complexometric titration was presented theoretically in the paper, and simple calculation method was also provided.