Chromatographic characteristics of monolithic capillary columns with different polarities

Relative polarity values and retention indices for a mixture of normal paraffins C₅–C₁₀ and alkylbezenes C₆–C₉ are determined for four types of monolithic capillary columns based on divinylbenzene, ethylene glycol dimethacrylate, pentaerythritol tetraacrylate, and pentaerythritol triacrylate. It is established that the retention of polar sorbates increases with a rise in stationary phase polarity, while the retention of nonpolar compounds grows with a reduction in stationary phase polarity.