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ISRN Analytical Chemistry
Volume 2012 (2012), Article ID 345684, 5 pages
http://dx.doi.org/10.5402/2012/345684
Research Article

Study of Metal-1,10-Phenanthroline Complex Equilibria by Potentiometric Measurements

Department of Chemistry, Faculty of Arts and Sciences, Uludağ University, 16059 Bursa, Turkey

Received 30 August 2012; Accepted 9 October 2012

Academic Editors: B. K. Jena and S. Sforza

Copyright © 2012 Naciye Türkel. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The interaction of Sc(III), Y(III), and La(III) ions with 1,10-phenanthroline (Phen) has been investigated, using the potentiometric method at 25  and  M KNO3. Collected potentiometric data were processed by the “BEST” software program to establish the complexation model for each system. SPE software program was used to evaluate the concentration distributions of the species formed in solution. The stability constants for the binary complexes increased as the ionic radii of the metal cations decreased.