A recent technique involving the use of paper electrophoresis is described for the study of the equilibria in binary complex systems in solution. The stability constants of ML and ML₂ complex species of some ions Cu (II)/ UO₂(II)/ Ni(II)/ Co(II)/ Zn(II)/ Cd (II) with Taurine were determined at an ionic strength of 0.1 perchloric acid and 35ºC. The stability constant of the ML and ML₂ complexes of metal - Taurine have been found to be (6.75, 5.89), (7.87, 5.10), (5.81, 3.69), (4.35, 3.58), (4.35, 3.30) and (4.31, 3.89) for Cu (II), UO₂(II), Ni(II), Co(II), Zn(II), Cd (II) complexes respectively.