自动电位滴定中的一阶导数二阶导数滴定曲线的绘制

电位滴定经常用一阶导数、二阶导数滴定曲线法判断滴定终点,其计算量大,不易准确确定终点.为了在实验测定中快速判断终点,使用Excel电子表格处理自动电位滴定实验数据,首先根据电位滴定数据处理数学模式,建立电位滴定数据处理表格,再根据计算模式加入计算公式,完成自动计算、作图.该数据处理方法可以由使用者自行编制,根据使用者情况作相应修改.结果表明,该方法操作简便,可以在滴定分析数据处理中推广使用.

Drawings of First Derivative Curve and Second Derivative Curve in Automatic Potential Titration

The curves of the first derivative titration and the second derivative are often used in potential titration in order to determine the end of titration.It needs a large number of calculations of data and is difficult to accurately determine the endpoint.The using of Excel in processing experimental data of automatic potential titration was discussed,according to the mathematical models of potential titration data processing.An electronic sheet of data process of the potential titration was built,according to the models of calculation.Formula was added in sheet.The detailed steps of the program and the methods of titration data-processing are discussed.The chart can be drawn automatically as well.The data processing method can be prepared by the user,according to the user＇s situation.This method can be spread in the use of other analysis data processing.