双铂电极交流示波电位滴定法

将两个同样大小的铂电极插入被滴定溶液中,让一个很小的交流电流通过两个电极并用示波器直接观察两极间的电位差(图1),荧光屏上出现一条荧光线,用荧光线的突然收缩或伸长指示滴定终点,这种简易的电滴定方法称为双铂电极交流示波电位滴定法。

Alternating Current Oscillo Potentiometric Titrations on Two Identical Pt Electrodes

Two identical Pt electrodes are put in the titrate. Asmall alternating current is passed through the electrodes which arc connected directly to an oscillograph. Afluorescent line showing the potential difference between the two electrodes appears on the screen. The sudden expand or contract of the line indicate the end point of titration. The end point is very sharp, especially in titration of a reversible titrate with a reversible titrant.