A study of the thermodynamics of solutions of oxygenated aliphatic and aromatic hydrocarbon solutes in water by a method that combines gas-liquid and liquid-liquid chromatography is presented. Solute infinite dilution activity coefficients in water were determined by liquid-liquid chromatography using water as mobile phase and squalane as stationary phase. Because of the highly polar nature of water, the possible contribution of interfacial adsorption to the retention mechanisms in liquid-liquid chromatography was assessed. The activity coefficients are all large reflecting the poor solubility of organic compounds in water. The greater the organic nature of the solute, the larger is the value of its activity coefficient. While the absolute accuracy of the data cannot be predicted, the reproduci-bility of the results is at worse ±10%. Comparison of the results with literature data obtained by independent techniques shows reasonably good agreement.
展开▼
