在自动电位滴定中,分析仪器主要分为二类,一类是先预定好终点电位,然后在该电位时,仪器自动关闭电动滴定管阀。由于终点电位需要作出电位滴定曲线之后才能找出,故分析时操作不够简便。另一类分析仪器则可自动绘制出整个滴定过程的电位滴定曲线。制造这类仪器的主要困难是滴定剂的体积变化量难以转变成仪器所能方便接受的信号,目前是采用 In the automatic potentiometric titration, the analytical instruments are mainly divided into two categories, one is the first scheduled end potential, and then at the potential, the instrument automatically shut down the electric burette valve. Since the end potential need to be potential titration curve to find, so the analysis is not easy enough. Another type of analytical instrument can automatically plot the potential titration curve of the entire titration process. The main difficulty in manufacturing such instruments is that the volumetric change in titrant is difficult to convert into a signal that the instrument can easily accept and is currently being used