Potentiometric study of vitamin E and vitamin D complexes with transitionmetals in acetonitrile- water medium

Vitamin E and vitamin D complexes with transition metals in 92% (v/v) acetonitrile- water medium. The stability constants for the transition metals with α- tocopherol and cholecalciferol have been studied using pH-measurements in 92% (v/v) acetonitrile- water medium. The values of proton- ligand stability constant and metal- ligand stability constants were calculated. The overall stability constants were determined and are quoted