Chromatography of Non-Ionic Organic Compounds on Ion-Exchange Resins
Author:
- 1 January 1975
- journal article
- research article
- Published by Taylor & Francis in Separation and Purification Methods
- Vol. 4 (2) , 189-214
Abstract
It is well known that organic compounds need not carry ionic charges in order to be absorbed by ion-exchange resins. Resin polymers are organic solvents in their own right. Swollen with water or another liquid, the polymer network is like a sponge, freely penetrated by molecules from the surrounding solution, Non-Coulombic attractions often reinforce the ionic or Coulombic attraction between the fixed ions of the resin and organic counter-ions. This fact was recognized by Moore and Stein in their famous paper1 on the cation-exchange chromatography of amino acids: “The rate of travel on a column of sulfonated polystyrene resin … ia a result of the affinity of the resin for both the ionic and the non-ionic portions of the molecule.”Keywords
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