ABSTRACT
Gas chromatography is a powerful tool for the determination of the physicochemical parameters of substances, this aspect of its practical application being of interest for analytical chemistry as well. Two major trends have developed in the application of gas-liquid-solid chromatography to physicochemical measurements: (1) determination of the equilibrium thermodynamic and physicochemical parameters describing the interaction between the sorbate and the stationary liquid phase; and (2) determination of the physicochemical parameters of adsorption of the chromatographed substance by the gas-liquid phase and liquid phase-solid support interfaces. Primary equilibrium values are used as a basis for the determination of thermodynamic quantities. When calculating equilibrium thermodynamic quantities that describe interaction between the sorbate and the stationary liquid phase one should use chromatographic quantities associated exclusively with adsorption of the chromatographed substance by the liquid phase.
