INTERACTION OF ORGANIC-ACIDS AND POLYPHEN OL COMPOUNDS ON THE COORDINATION BOND OF ALUMINUM

We have already reported the aluminium binding ability associated with organic acids, polyphenol compounds and dietary fiber(3)). Aluminium ions were easily bound to citric acid, oxalic acid and tannic acid. Or ganic acids and polyphenol compounds are commonly co-existing in foods . Absorption amount of aluminium may be influenced to co-existing liga nds. Binding property of aluminium ion with citric acid or oxalic acid was investigated in the presence of polyphenol compounds. Consequentl y, the binding ability of aluminium ions was increased by oxalic acid in the presence of polyphenol compounds.