Beitrag zur Theorie der Chromatographie II. Einfluss der Diffusion ausserhalb und der Adsorption innerhalb des Sorbens-korns

Analytical solutions and moment analysis of chromatographic models for rectangular pulse injections

“…The moments are used to get expressions for retention times, band broadenings, front asymmetries and kurtosis. Such moment analysis is well-known and the approach has been found instructive in the literature [3,4,[7][8][9][10][11][12][13][15][16][17][18]. In this manuscript, the first four moments of the EDM and LKM are derived analytically for rectangular pulse injections under linear conditions.…”

Exact solution of a model for diffusion and transient adsorption in particles and longitudinal dispersion in packed beds

“…Such constants can be evaluated from chromatographic measurements employing the statistical moments describing the chromatographic peak (Kubin, 1965;Kucera, 1965). This method was used, for example, by Schneider and Smith (1968) in evaluating experiments with adsorption of ethane, propane, and n-butane on silica gel.…”

“…1 and 2. It states mathematically that the mass entering or leaving the particles must equal the flow of mass transported across a stagnant fluid film at the external surface.The Laplace transform of C , e, with the slightly different inlet condition: C(0, t ) = C" C(0, t ) = 0 0 5 t 5 t,, t > t,, has been derived by Kubin (1965), and was used to obtain up to the third central moment of the chromatographic curve C(z, t). Using the properties of the Laplace-transform, the transform for the present inlet condition (Eq.…”

On the optimization of the solid core radius of superficially porous particles for finite adsorption rate

“…The theoretical equation of the HETP for columns packed with spherical particles was developed by Kucera and Kubin by application of the moment analysis to elution peaks calculated with the General Rate (GR) model [5][6][7].…”