DETERMINATION OF DISSOCIATION-CONSTANTS OF AROMATIC CARBOXYLIC-ACIDS BY ION CHROMATOGRAPHY

The method for the numerical analysis of the substituent effect on the retention times of substituted benzoate anions in ion chromatography was applied to that of substituted naphthoate anions in order to determine the dissociation constants of several aromatic carboxylic acids. The C-5-C-8 part of naphthalene was postulated as a substituent of benzoate, and the steric effect index and the positional effect correction index of the substituent were determined. Finally, the dissociation constants of substituted naphthoic acids were determined.