Abstract
The method developed by Osterberg, Sarkar, and Kruck for obtaining the concentrations of free ions in solutions of complex equilibria from pH titration data has been studied to establish the conditions under which the method gives accurate values for free ligand and free metal concentrations in systems containing a variety of complexes, including protonated, hydroxy, mixed ligand, and polynuclear complexes. Simulated titration data have been used so that the true values of free ligand and free metal concentrations would be known. Calculation procedures are described for each step in the data evaluation, including procedures for extracting information about the stoichiometry of the complexes from the unique information provided by this method. The effect of various systematic and random errors is also considered.
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