Chromium(III) may be determined complexometrically in a pseudotitration in which no reaction takes place in the bulk of the solution. Redox catalyzed titration reaction proceeds only in the vicinity of the indicating electrode. The titration curves for solutions containing additional metal ions which react with EDTA are discussed and classified according to their reduction potentials, equilibrium, constants and reaction rates. In certain combinations two or more metals may be determined simultaneously from one titration curve. Examples given are Cr/Hg, Cr/Cd, and Cr/Zn.