Donnan Exclusion Chromatography Application to Complex Formation Studies

Abstract A new method for the evaluation of stability constants of complex species has been proposed, based on the principle of Donnan exclusion chromatography. The stability constants for trimetaphosphate complexes of magnesium and calcium ions have been evaluated to be log β1 = 1.50 and 1.64 (I=1.00, 25° ± 2°C), respectively.