Correlation of C_l Terms with Pore Size Distribution in Gas Liquid Chromatography.

High-Pressure Gas Chromatography and Chromatography with Supercritical Fluids. II. Permeability and Efficiency of Packed Columns with High-Pressure Gases as Mobile Fluids under Conditions of Incipient Turbulence

“…For the experiment with n-pentane on column E (Fig. 4), where a fine packing is used in conjunction with a narrow column and hydrogen as the carrier gas, C, should be very small, in fact much smaller than 0.005 sec (value found for column A with CO, * Saba and Giddings (18) found a significant effect of particle size on Cl with lowloaded Chromosorb G. They also showed that Chromosorb W of different size may have a somewhat different pore-size distribution which could lead to a similar dependence of CI on particle size (17). However, these materials differ from Sil-0-Cel in the use of flux in their preparation, which could more easily cause the existence of parts of different porosity and friability.…”

Preparation and evaluation of polar stabilized phase open tubular (SPOT) columns

“…From these values the phase ratios (V G/VL) of the columns under study were calculated. The resistance to mass transfer in the liquid phase (CL) was calculated from the combined H-u measurements in He and N2 carrier gases [13]. See also Fig.…”

Applications of Gas Chromatography in Catalysis

“…10, No. 3, 1971 227 Further, an attempt was also made by Saha and Giddings (1965) to correlate the measured liquid-phase nonequilibrium term of glc with physical properties and the structure of the support, in particular with the support's pore size distribution. Diffusion measurements (Fatt, 1959) have also been found to provide the information about the pore structure (tortuosity factor) in sintered glass.…”