Learn More
Adsorbate-adsorbent and adsorbate-adsorbate interactions having decisive influence on the distribution of adsorbate between gas-solid phases in inverse gas chromatography (IGC) have been thermodynamically explained. Specific retention volumes, second adsorption virial coefficients and Kováts retention indices, likewise their dependencies on column(More)
Three ordered mesoporous siliceous (OMS) materials known as MCM41s—unmodified MCM-41C16 (''C16''), and two MCM41s with different surface func-tionalities: MCM-41C16-SH (''C16-SH'') and MCM-41C16-NH 2 (''C16-NH 2 '')—were synthesized and studied by inverse gas chromatography in order to determine their acceptor–donor properties. The specific retention(More)
Propane adsorption isotherms have been chromatographically determined on active carbon for different amounts of the injected adsorbate on column. The dependencies between the specific retention volume corrected to the standard temperature (273.15 K), Vg(273), and the molar differential work of adsorption, A, have been calculated on the basis of the propane(More)
The adsorption properties of the ordered mesoporous siliceous materials: MCM-41C16 (denoted as C16), MCM-41C16-SH and MCM-41C16-NH(2) (known as MCMs) having different surface functionalities were studied by inverse gas chromatography to assess their suitability for adsorption of analytes from gas and liquid phases. Polar and non-polar adsorbates were(More)
The differential isosteric enthalpies, -deltaH(ads), and entropies, -deltaS(ads), of adsorption were calculated taking the retention times of the peak maxima and the centres of gravity of peaks into account and compared with the results obtained from the adsorption second virial coefficients. A mathematical link between the -deltaH(ads) and -deltaS(ads)(More)
The most correct analysis of the compositions of diverse analytes mixtures is significant for analytical studies in different fields; however, many prevalent analytes cannot be identified employing traditional partition gas chromatographic methods. Thus, the increasing requirements on analytes of isomeric compounds and the problems encountered in their(More)
The ordered mesoporous siliceous materials: MCM41C16, MCM41C16-SH and MCM41C16-NH(2) (known as MCMs) having different surface functionalities were studied by inverse gas chromatography at infinite dilution of chromatographed substances to elucidate their adsorption and adhesive properties. The free energies of adsorption, DeltaG(ads), were calculated in two(More)
The ordered mesoporous siliceous materials: MCM41C16, MCM41C16-SH and MCM41C16-NH(2) (known as MCMs) having different surface functionalities were studied by inverse gas chromatography to characterise their acceptor-donor properties. The DN values denoting the donor number in the Gutmann scale and the AN* values denoting the acceptor number in the(More)
  • 1