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.
Proceedings of the Iowa Academy of Science
© Copyright 1965 by the Iowa Academy of Science, Inc.
Ward, Edward H.; McRae, Larry G.; and Maatman, Russell W.
"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