Studies on mixed ligand complexes of Cu(II), Ni(II), Zn(II) and Cd(II) with 8-hydroxyquinollne-5-sulphonic acid & anthranilic acid/nicotinic acid

812-813pH-metric studies on the interaction of Cu(II), Ni(II), Zn(II) and Cd(II) with 8-hydroxyquinoline-5-sulphonic acid (HQSA) in the presence of anthranilic acid (AnthA) or nicotinic acid (NicoA) indicate the simultaneous formation of 1:1:1 mixed ligand chelates; however, no complex formation occurs in the systems Zn(II)/Cd(II)-HQSA-NicoA