Abstract
The adsorption energy distribution function was calculated according to the asymptotically corrected condensation approximation method from n-octane and toluene retention data for two thermally treated and rehydroxylated controlled-porosity glasses. Similar calculations were performed for a model series of silica gels, the surfaces of which were previously covered with boron and sodium compounds. Certain differences in surface site distributions were observed. The results for toluene were then correlated with changes in the surface free energy. Such correlations are presented separately for thermally treated and subsequently rehydroxylated materials. The results are discussed in terms of the differences in surface chemistry.
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