1991 Volume 7 Issue 6 Pages 935-940
The acid-base equilibrium constant of the active component of the commercial extractant LIX 54, 1-phenyl-1, 3-decanedione, has been determined in a water/alcohol mixed solvent (25% ethanol) at 298K using 1.0mol dm-3 KCl as an ionic medium. Graphical and numerical treatment of spectrophotometric data have led to the value pKa=9.73±0.05. The distribution, aggregation and interactions of the reagent with other extractants used in synergistic mixtures are also discussed. A comparison of the extraction of Cu(II), Ni(II) and Zn(II) from nitrate solutions by the reagent and by mixtures of the reagent with additional ligands in toluene has been made.