电滴定分析的新方法

New Techniques in Electrometric Titration

利用示波极谱图上切口的出现或消失来指示滴定终点的示波极谱滴定法具有终点直观、操作简便和抗干扰能力强等优点。但该法要求试剂(滴定剂、被滴物或指示剂)能在示波极谱图上产生敏锐切口才能应用。

Five new techniques in electrometric titration are described.They are:ⅠOscillopolarographic titration at 1 micro and 1 macro Pt-electrodes.Ⅱ.Oscillopolarographic titration at 3 electrodes.Ⅲ.Oscillo-potentiometric titration at 3 electrodes.Ⅳ.Oscillo-potentiometric titration at 1 micro and 1 macro Pt-electrodes.V.A.C.Oscillo-potentiomctric titration at 2 macro Pt electrodes.The methodsⅠandⅡuse the abrupt change of oscillopolarogram to indicate end-point but do not require the oscillopolarograms to have a sensitive incision.The others do not use any oscillopolarogram but use the abrupt potential change between electrodes.