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The interaction of the vanadyl(IV) cation with phytic acid
1Química Inorgánica (QUINOR), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Argentina.
Biological Trace Element Research
|February 1, 1993
Abstract:
The interactions of VO2+ with phytate to form both soluble and insoluble complexes, have been studied by electronic absorption spectroscopy. A soluble 1:1 VO2+:phytate complex is formed at pH < 1. At higher pH-values insoluble complexes are produced. Two different solid complexes, obtained respectively at pH = 2 and 4, were isolated and characterized. The maximal bonding ratio of VO2+:phytate was found to be 4, on the basis of a pH binding profile.