Abstract
The author's published work has been used to illustrate certain aspects of ion-exchange resin stability and sorption behaviour in non-aqueous and mixed solvent media. Solvent and thermal stability have confirmed that even strong-base ion-exchange resins are sufficiently stable in methanol and heptne media at ambient temperature to permit their use in analytical separations. The enhanced selectivity differences of ion-exchange resins for inorganic ions in mixed media is illustrated by the sorption of alkali metal ions on Zeo-Karb 225 (hydrogen form) from aqueous methanol, aqueous ethanol, and aqueous acetone. Finally, on the organic side, the discussion of work on the separation principles of phenols from methanolic media with De-Acidite FF (acetate form) is extended to the wider context of ion-exchange fractionation of peat and petroleum constituents.
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