Chromatographic Adsorption Analysis

Chromatographic Characterization of Adsorption Properties of Carbon and Silica Adsorbents

Adsorption isotherms and specific retention volumes of benzene on MCM41C16 mesoporous silica and F4O porous carbon were determined at different temperatures by employing inverse gas chromatography. The differential isosteric enthalpies, -∆Hads , and entropies, -∆Sads , of adsorption were calculated from the retention time data and compared with the results obtained from the adsorption second vi...

State Estimation in Chromatographic Smb Processes with Linear Adsorption Isotherms

Chromatographic separations are widespread in the fine chemicals and pharmaceutical industries for the downstream processing of complex mixtures with similar thermodynamic properties. In recent years, continuous chromatographic processes, in particular Simulated Moving Bed (SMB) processes are increasingly applied in industry. SMB processes are characterized by a counter-current movement of the ...

Modeling chromatographic columns non-equilibrium packed-bed adsorption with non-linear adsorption isotherms.

In this work a new mathematical model, based on non-equilibrium conditions, describing the dynamic adsorption of proteins in columns packed with spherical adsorbent particles is used to study the performance of chromatographic systems. Simulations of frontal chromatography, including axial dispersion, for non-equilibrium systems with non-linear adsorption isotherms are made and compared to thos...

Chromatographic analysis of tryptophan metabolites

The kynurenine pathway generates multiple tryptophan metabolites called collectively kynurenines and leads to formation of the enzyme cofactor nicotinamide adenine dinucleotide. The first step in this pathway is tryptophan degradation, initiated by the rate-limiting enzymes indoleamine 2,3-dioxygenase, or tryptophan 2,3-dioxygenase, depending on the tissue. The balanced kynurenine metabolism, w...

[Paper chromatographic analysis of plasmalogens].