Electrophoretic Studies of Binary and Ternary Complexes of Some Metal Ions with Alizarin

Quantitative studies of complex formation from the determination of stability constants of the binary complexes of metal (II)/(III)alizarin and also the mixed complexes of metal (II)/(III)alizarin-NTA have been described using paper electrophoretic technique. The stability constant of metal-(II)/(III)-alizarin are found to be 105.14, 104.84, 104.44 and 104.14 and mixed complexes of metal (II)/(III) have been found 105.40,105.10,105.00 and 104.70 for Cr(III), Cu(II),Ni(II) and Zn(II) respectively at 350C and ionic strength I=0.1 mol dm-3 (HClO4).