Classification of stationary phases and other materials by gas chromatography

The origin and evolution of solute descriptors for use in the solvation par ameter model applied to the classification of stationary phases and other m aterials by gas chromatography are described. The model system constants pr ovide a breakdown of solute-stationary phase interactions in terms of the c ontribution to retention of cavity formation and dispersion interactions, l one-pair electron interactions, interactions of a dipole-type, and hydrogen -bonding interactions. The solvation properties of additional stationary ph ases with useful complementary selectivity to existing phases for method de velopment in gas chromatography are identified. The influence of temperatur e on system selectivity and stationary phase classification is discussed. T he contribution of interfacial adsorption to the estimation of retention in method development in gas chromatography is outlined. In addition, for mat erials characterization, it is shown that the solvation parameter model pro vides a conceptual mechanism for the evaluation of the sorption properties of a wide range of materials compatible with the operation characteristics of gas chromatography. (C) 1999 Elsevier Science B.V. All rights reserved.