Determination of solubility parameters and thermodynamic properties in hydrocarbon-solvent systems by gas chromatography

gas chromatography used to calculate the specific retention volume of several hydrocarbons in different chromatographic liquid phases (squalane, carbowax-400, carbowax-1500, carbowax-4000, amine-220, dinonyl phthalate, tributyl phosphate and trixylenyl phosphate). some thermodynamic parameters, such as enthalpy of sorption and flory-huggins parameters relating the interaction between liquid phases and solutes, were also calculated from the determined retention volumes. liquid phase solubility parameters of squalane, carbowax-400, carbowax-1500 and carbowax-4000 at 80 oc as well as the polar and apolar components were calculated too. a new model was proposed to correlate polar contribution to the solubility parameter of a liquid phase with the specific retention volume of a solute in this liquid phase.