Studies of binary complexes of transition metal ions with Gallic Acid by Potentiometry

1 P.G.Dept .Of Chemistry, Sir Syed College, Aurangabad, (M.S.) India 2 Dr Rafiq Zakaria College for Women, Aurangabad ,( M.S.) India 3 Dept .Of Chemistry, Milliya Senior College, Beed, (M.S.) India . Abstract: Phenolic acids are a complex group of substances that have gained enormous attention in the last years , because of their biological properties , especially from their importance as a secondary plant metabolites , their ecological role and natural antioxidant capacity , physiological effects , use as markers in taxonomic studies , and their properties related to food quality. The dissociation constants of polyphenolic acids are biologically important physicochemical parameters.They constitute important data for the thorough understanding of certain chemical phenomena such as activity and rates ,biological uptake and receptor binding of substances at the molecular level.Traditionally, water has been considered the solvent which best represents the biological conditions .The binary complexes of metal ions Co 2+ ,Ni 2+ ,Cu 2+ , Zn 2+ ,Cd 2+ and Fe 3+