Abstract
A seris of alkyl-substituted phenols were chromatographed on four liquid chromatographic columns: three straight-phase systems on nitrile phases and one reversed-phase system on octadecylsilane. On the nitrile phases, the alkylphenols are eluted in the order di- ortho-, mono- ortho- and non- ortho-substituted phenols, while on the reversed-phase system, it is primarily the number of substituted alkyl carbon atoms that determined the retention. Two-column plots, i. e., log k′ on reversed phase versus log k′ on straight phase, give three well separated straight lines representing the di-, mono- and non- ortho-substituted phenols. Combination of straight- and reversed-phase liquid chromatography and capillary column gas-liquid chromatography provides an effective means for the separation and identification of complex mixtures of alkylphenols.
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