Calculation of concentrations of hydrochloric and citric acids together in a mixture with hydrolysable salts

Abstract

A standard additions method based on the results of titrations in isomolar titrand-titrant systems was applied to the determination of hydrochloric and citric acids in a mixture with various hydrolysable salts or their mixtures, at high ionic strengths. The concentrations of the acids were found by applying the iterative MINUITS procedure to a semi-empirical regression function expressed by the Padé approximant. The results obtained were characterised by good accuracy and precision.