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Experimental characterization and modelling of analytical monolithic column.
Michal Zabka1, Mirjana Minceva, Alírio E Rodrigues
1Laboratory of Separation and Reaction Engineering (LSRE), Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias s/n, 4200-465 Porto, Portugal.
Journal of Biochemical and Biophysical Methods
|November 25, 2006
Summary
This study investigated adsorption in a silica monolithic column. A mathematical model accurately predicted experimental results for hydrodynamics and adsorption kinetics.
Area of Science:
- Analytical Chemistry
- Chemical Engineering
Background:
- Silica-based monolithic columns offer unique chromatographic properties.
- Understanding adsorption dynamics is crucial for optimizing separation processes.
Purpose of the Study:
- To investigate hydrodynamics, equilibrium, and kinetics of adsorption in a Chromolith Performance RP-18e column.
- To develop and validate a mathematical model for adsorption dynamics in monolithic columns.
Main Methods:
- Calculated column permeability using Darcy's law for laminar flow.
- Characterized column efficiency using height equivalent to a theoretical plate (HETP) for myoglobin, phenol, and progesterone.
- Applied a 2-D single channel mathematical model incorporating parabolic velocity profile, diffusion, linear driving force model, and linear adsorption equilibrium.
Main Results:
- The Darcy law provided accurate permeability calculations.
- HETP values indicated column efficiency for tested analytes.
- The mathematical model successfully predicted experimental elution peaks.
Conclusions:
- The developed mathematical model is effective for describing adsorption dynamics in silica-based monolithic columns.
- This work provides insights into the performance of monolithic columns for chromatographic separations.
- The study validates the predictive capability of the model for hydrodynamics and adsorption kinetics.
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