Flow method for the titration of weak acids or weak bases using linear titration plots

Abstract

Continuous flow titrations of weak acids or weak bases can be carried out with a simple apparatus if the pH and titrant flow-rate data are treated using a linear titration plot method. Titrant is added to a flowing sample stream by a peristaltic pump with a precisely adjustable rotation rate. The results obtained for a variety of weak acids and weak bases are similar in accuracy to those given by corresponding burette titrations of discrete portions of sample.