INVESTIGATION OF THE FORMATION OF PHYTATE-METAL COMPLEXES

Abstract

The complex formation of phytic acid with calcium-, magnesium-, zinc-and copper ions were studied in model solutions using potentiometric titration. A constant ionic back concentration (2M/dm³) was assured by NaCIO₄. The phytic acid-metallic ion ratio was 1:1. The pH-ranges investigated were the following ones Ca: 4,0-8,0; Mg: 2,0-7,5; Cu: 3,0-5,5; Zn: 3,0-5,0. Stability constants of the phytic-acid-metal complexes were calculated from the experimental data.