ION CHROMATOGRAPHY OF ANIONS - A-PRIORI CALCULATIONS OF RETENTION TIME

A procedure is developed for estimating the equilibrium distribution o f dibasic acid ions in the anion-exchanger phase. Concentration consta nts of the exchange of carbonate anions for hydroxyl ions are determin ed. Using nitrate, sulfate, and chloride ions as an example, it is fou nd that the position of the peak maximum in the chromatogram is satisf actorily described by the equilibrium dynamics theory. Nomograms are c onstructed for the a priori estimation of the retention time of anions from the analytical concentration of the eluent and its pH.