Prediction of retention in gas-liquid chromatography using the UNIFAC group contribution method: II. Polymer stationary phases

摘要: Abstract The UNIFAC group contribution method and its free volume modified version have been used to calculate thermodynamic activity coefficients hence specific retention volumes for a number of solutes at infinite dilution in range polymeric gas-liquid chromatographic stationary phases including Carbowax several the OV series methyl silicones. Specific partition calculated predict relative retentions order elution solutes, these were compared corresponding experimental values. However, although some cases results predicted within few percent their values, general agreement is not good enough give reliable predictive solvents so reinforces conclusions from work on low-molecular-weight that wider application methods awaits future developments.