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利用在一定条件下,溶液体系中待测物浓度的变化引起化学电池中某一电物理量(如电导、电位、电流等)的突变以指示滴定终点,这就是电滴定分析的基本原理。电滴定分析有终点敏锐,减少了目视终点的误差,易于连续滴定和自动滴定,可用于常量测定,更适用于微量分析,还可用于有色物质和混浊体系的滴定。因此,在电化学分析快速发展的同时,电滴定分析也有一定发展。多元络合物应用于络合滴定有许多优点,应用于电滴定也是有其特色的。下面就近年来的应用情况作一简单介绍。
Under certain conditions, the change of concentration of the analyte in the solution system causes a sudden change in the physical quantity (such as conductance, potential, current, etc.) of a certain electrochemical cell to indicate the end point of the titration. This is the basic principle of electrodialysis analysis. The electrotainting analysis has a sharp end point, reducing the error of the visual endpoint, easy to continuous titration and automatic titration, can be used for constant determination, more suitable for trace analysis, but also for the titration of colored substances and turbid systems. Therefore, the rapid development of electrochemical analysis at the same time, the electroblotting analysis also has some development. The application of complex complexes in complexometric titration has many advantages. It also has its own characteristics in electrodialysis. Here’s a brief introduction to the application in recent years.