Novel graphical method for the simultaneous determination of stability constant and molar absorptivity of some metal - Chrome Azurol S complexes

Chemistry Department, University of Allahabad, Allahabad-211 002, Uttar Pradesh, India E-mail : mcc46rediffmail.com Chemistry Department, Ewing Christian College, Allahabad-211 002, Uttar Pradesh, India E-mail : shardalOO@rediffmail.com Manuscript received 19 January 2009, revised 15 May 2009, accepted 16 June 2009 Stability constants and molar absorptivities of complexes formed by Chrome Azurol S (tri sodium salt of 3" -sulpho-2":6" -dichloro-3:3' -dimethyl-4-hydroxy-fuschsone-5:5-dicarboxy acid) with metal ions like AlIII , ScII, Cull, ThIV and UVI ions have been determined by a novel graphical method in which neither the concentration of ligand has to be kept high in comparison to the concentration of metal ion nor any term has to be omitted to get the linear equation