Abstract
Interaction of macroporous methyl methacrylate copolymers carrying strongly acidic sulphopropyl groups exchanged with metal ions of the IIb, VIb, VIIIb and rare earth groups of the Periodic Table with solutes—homologous alkanes, aromatic hydrocarbons, ketones, alcohols and organic acids— were studied by gas chromatography. The results show that the sorbents belong to class 3 according to Kiselev since, in addition to interactions due to dispersion forces, they also exhibit strong specific interactions. In comparison with the original copolymers, the ion exchangers carrying sulphopropyl groups exhibit stronger specific interactions, in particular with alcohols, due to hydrogen bonding. The methacrylate-based ion exchangers in salt form exhibit weaker specific interactions than the same sorbents in H + form. Non-specific interactions involving dispersion forces generally predominate.
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