Comparison Between Some Simple Computer-Calculated and Experimental Ion Exchange Elutions

Authors

Edward H. Ward, University of Mississippi
Larry G. McRae
Russell W. Maatman, Dordt CollegeFollow

Document Type

Research

Abstract

A method for calculating the elution curves for certain ion exchange columns is given. Equilibrium is assumed to be achieved in theoretical plates of finite height. Predicted and experimental elutions agree where it is possible to circumvent non-equilibrium factors by use of the plate concept. Methods are given for elutions both where there is and where there is not co-ion reaction with counter-ion. The mathematical solutions are lengthy because approximations are avoided, necessitating the use of a high-speed computer. Comparisons with experimental results, using Amberlite CG-120 columns, are given for band elution of Na⁺ by HNO₃ elution by NaNO₃ of the resin entirely in the acid form, and elutions by HNO₃ and acetic acid of the resin entirely in the Na form. In all but the acetic acid elution the elution curve was correctly predicted by assuming 13-18 plates per centimeter; with acetic acid the curve shape was correctly predicted and shown to be almost insensitive to the number of plates assumed.

Publication Date

1965

Journal Title

Proceedings of the Iowa Academy of Science

Volume

72

Issue

1

First Page

169

Last Page

179

Copyright

©1965 Iowa Academy of Science, Inc.

Language

en

File Format

application/pdf

Recommended Citation

Ward, Edward H.; McRae, Larry G.; and Maatman, Russell W. (1965) "Comparison Between Some Simple Computer-Calculated and Experimental Ion Exchange Elutions," Proceedings of the Iowa Academy of Science, 72(1), 169-179.
Available at: https://scholarworks.uni.edu/pias/vol72/iss1/27