示波极谱图的伸缩及位移

The Principle of Expansion-Contraction and Position Shift of Oscillopolarogram

利用示波极谱图的伸缩或位移指示滴定终点是示波极谱滴定的一种新技术.本文全面探讨了示波极谱图伸缩及位移的原理,并用实验作了对照,理论计算与实验结果一致.伸缩来源于电极阻抗的变化,位移则主要由动力学因素引起.

Using expansion (contraction) and position shift of the whole oscillopolarogram to indicate the end- point of titration is a new technique which is a very useful oscillopolarographic titration method. This paper reports the principle of this method. The theoretical predictions consist with the experimental results. Expansion (contraction) of oscillopolarogram is due to the variation of electrode impedance and the position shift comes from the differences between kinetic factors at two electrodes.