Table of Contents
International Journal of Inorganic Chemistry
Volume 2012, Article ID 515196, 6 pages
Research Article

Reversed-Phase Column Extractive Separation of Gd(III) with Poly[dibenzo-18-crown-6]

1Analytical and Environmental Research Lab, Department of Chemistry, Shivaji University, Kolhapur 416 004, India
2Department of Chemistry, Jaysingpur College, Jaysingpur 416101, India

Received 12 November 2011; Accepted 6 February 2012

Academic Editor: Karl Kirchner

Copyright © 2012 K. R. Mahanwar et al. 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.


A poly[dibenzo-18-crown-6] exhibits good chemical stability, reusability, and faster rate equilibrium for the separation of Gd(III). Both uptake and stripping of metal ions were rapid, indicating a better accessibility of the complexing sites. The proposed method has been applied for chromatographic separation of Gd(III) by using picric acid as medium and poly[dibenzo-18-crown-6] as stationary phase. The influences of picric acid concentration, different eluting agents, and so forth, were discussed and the optimum conditions were established. The breakthrough capacity of poly[dibenzo-18-crown-6] for Gd(III) was  mmolg−1 of crown polymer. The proposed method has been applied to sequential chromatographic separation of their binary and multicomponent mixtures. Gd(III) has been determined from real samples with good analytical reliability.