Special attention has been paid to relationship between the end point error and maximum sharpness index for precipitation titration.

导出了一个内含最大敏锐指数的终点误差公式，由此获得了一个计算沉淀滴定突跃范围的公式。

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This article discusses the acidic potassium permanganate method of permanganate index from the following aspects: heating time, titrate temperature and titrate speed, end point of titration.

前言：文章对高锰酸盐指数加热时间、滴定温度、速度、滴定终点的控制进行了探讨。

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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。

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