Abstract
The enthalpies of phenols and aromatic acids were measured in order to characterize their behaviour on an octadecyl-bonded vinyl alcohol copolymer gel in reversed-phase liquid chromatography. These values were compared with the enthalpies measured on an octadecyl-bonded silica gel. The enthalpies of non-polar compounds, measured on an octadecyl-bonded silica gel, were higher than those obtained on the bonded vinyl alcohol copolymer gel. However, the enthalpies of phenols and aromatic acids were higher than those obtained on an octadecyl-bonded silica gel. This means that hydrogen bonding may be involved in the retention of phenols and aromatic acids on this vinyl alcohol copolymer gel.
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