Application of calculating analytical method to mixed reaction solution of weak acids

A calculating analytical method based on Gordon model and with the aid of optimization for determining dissociation constants as well as contents of mixed polybasic acids is presented. Simulated sample and mixed reaction solution of polybasic acids are analyzed in comparison with the results of ion-chromatography. The calculation error is less than 7%. The advantage of this method consists in sample analysis without preliminary separation, therefore it belongs to initial dynamic analysis.