Keywords: Electrophoretic method, Mercury(II) complexes, Nickel(II) complexes, Lead(II) complexes, Proline, Stability constant

Abstract

A method involving use of paper electrophoresis is described for the study of equilibria in binary ligand [proline] complex systems in solution. This technique is based on the movement of the spot of metal ion in an electric field at various pH's of background electrolyte. A graph of pH versus mobility was used to obtain information on the binary complexes and to calculate stability constants. The stability constants of the ML and ML2 binary complexes of [mercury(II) – proline], [nickel(II) – proline] and [lead(II) – proline] have been found to be (8.74 ± 0.04; 7.43 ± 0.03), (7.23 ± 0.01; 5.78 ± 0.03) and (4.93 ± 0.02; 3.25 ± 0.05) (logarithm stability constant values), respectively at ionic strength 0.1 M (HClO4) and a temperature of 35° C.