Date of Award


Degree Name

Master of Science



First Advisor

Dr. Subra Muralidharan

Second Advisor

Dr. Donald R. Schreiber

Third Advisor

Dr. Brian P. Buffin

Access Setting

Masters Thesis-Open Access


We have investigated the separation of Co(II), Ni(II), Cu(II) and Zn(II) by the ligands 8-hydroxyquinoline- 5-sulfonic acid and 7-iodo-8-hydroxy-quinoline- 5-sulfonic acid in the presence of the anionic surfactant sodium dodecyl sulfate (SDS) and the cationic surfactant octyltrimethylammonium bromide (OTAB) . Baseline separations have been achieved by HPLC employing an octadecylsilanized silica (ODS) column. The underlying mechanisms of separation have been determined.

The significant new results of our studies are: (1) separation is not possible without the presence of surfactants and hence organized assemblies; (2) separations can be achieved under submicellar concentrations; (3) the separations are not driven by micelles; and (4) several competing equilibria must be taken into account to understand the mechanism of separation.

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