DIFFERENTIAL RECIPROCAL OSCILLOGRAPHIC CHRONOPOTENTIOMETIC TITRATION

A new method called differential reciprocal oscillographic chronopotentiometrictitration is presented.It makes use of appearance or disappearance of a peak of depolarizer ondifferential reciprocal oscillogram indicating the end point of titration.This method was appliedto titration of Pb²⁺, Cd²⁺, Ni²⁺, Co³⁺, Zn²⁺, Ga³⁺ and Cu²⁺by EDTA or EGTA.The end point oftitration is very easy to observe and the sensibility of the method is higher than that ofdiffcrcntial oscillographic chronopotcntiometric titration