示波极谱滴定的新技术

经常的示波极譜滴定利用切口的出现与消失指示滴定终点。本文报导了一种示波极谱滴定的新技术,即通过电解池的交流电流很小,调节“(dE)/(dt)-E”曲线为一个园,利用整个示波极谱图的突然位移来指示终点。铂电极为极化电极,钨电极为对电极,甘汞电极为参比电极,观察铂电极对于参比电极的示波极谱图。

NEW TECHIQUE IN OSCILLOPOLAROGRAPHIC TITRATION

In ordinary oscillo-polarographic titrations the end points are often determined by the aid of apperance or disappearance of an incision of oscillopolarams. In this paper a new technique for end point detection is described. A small alternating current was applied to the cell,making the oscillopolar ogram approximatly to be a circle. The whole graph would shift along potential axis sharply nearing the end point indicating its arrival.The cell consisted of three electrode systems and a Pt micro-electrode was used as working electrode.The technigue was examined experimentally and found to be valid for all the four types of titrations