Abstract
The nature of the interactions between the main gel permeation chromatography (GPC) components. viz., the solute, eluent and gel, was examined. Corning controlled porosity glass (CPG) was chosen as the column packing and the separation of low-molecular-mass organic molecules, polystyrene standards and narrow-molecular-mass-distribution poly-2-vinylpyridine samples was carried out. Pure eluents (methyl ethyl ketone and dimethylformamide) and mixed eluents (methyl ethyl ketone-ethanol, methyl ethyl ketone-acetone and dimethylformamide-methanol) were used. The results showed that the attractive physical forces between solutes and CPG also contribute to the mechanism of separation. These forces could be suppressed or avoided by changing the nature of the solvent.
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