Estimation of the Binding Constants of Hexoses to the Counter-ion of a Cation-exchange Resin Based on Their Apparent Distribution Coefficients to the Resin

Abstract

The apparent distribution coefficients K_app of glucose, galactose, mannose and fructose onto the resins with different divinylbenzene contents in Li⁺, Na⁺, K⁺, Ca²⁺ and Sr²⁺ forms were determined in a dilute system by the moment analysis of the elution profile. The binding constant B of a solute to a counter-ion, which was free from the effect of swelling pressure of the resin, was estimated from the K_app values based on our previous model where glucose was assumed to form no complex with any counter-ion. The B value for each solute, except for glucose, could be correlated with the dynamic hydration number of the counter-ion.