GAS ADSORPTION CHROMATOGRAPHY

It is found that the "retention volume" in gas adsorption chromatography may be identified in a very simple way with the concept of "apparent volume" in the equation of state for high temperature physical adsorption first derived by Halsey etal. It is shown that a considerable body of experimental chromatographic data reduces down to the two parameters of the theory in a reasonable way. The single parameter describing temperature dependence is seen to be related simply to the number of carbons in the skeleton for a series of hydrocarbons, while the parameter describing column capacity shows regular, though unanticipated, behavior. This theoretical connection provides a complete link between static measurements and gas adsorption chromatography.