UDK 546.215:546.4/.8 INFLUENCE OF SELECTED METAL IONS ON STABILITY OF HYDROGEN PEROXIDE IN PRESENCE OF EDTA Utjecaj selektiranih metalnih iona na stabilnost vodik peroksida u prisustvu EDTA

Stability of hydrogen peroxide in time was investigated in the presence of various metal ions and a complexing agent ethylenediaminetetraacetic acid (EDTA). Metal ions: Fe(III), Mn(II), Co(II), Cu(II), Ni(II), Zn(II) and Pb(II) were applied at different concentrations with a chelator in a concentration of 1 ·10 mol/dm, and the solutions were kept at 4C between the measurements. Obtained data indicate the existence of pronounced catalytic effect for Fe(III), Mn(II), Co(II) ions on stability of hydrogen peroxide. Cu(II) ions showed significant catalytic influence only when applied at high concentration. Ni(II), Pb(II) and Zn(II) did not show significant catalytic effect on the decay of hydrogen peroxide at applied concentrations.