Pressure drop in liquid chromatography
1Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ljubljana, Slovenia.
Journal of Separation Science
|November 15, 2018
Summary
Pressure drop in chromatography offers more insights than just flow rate control. Analyzing this parameter reveals crucial information about chromatographic media performance, sample interactions, and layer thickness, enhancing process understanding.
Area of Science:
- Analytical Chemistry
- Chromatography
- Chemical Engineering
Background:
- Pressure drop measurement is a standard practice in chromatographic separations.
- Typically, pressure drop data is solely used for regulating mobile phase flow rate within operational limits.
- This overlooks the potential of pressure drop as a valuable indicator of chromatographic process performance.
Purpose of the Study:
- To review and discuss various parameters influencing pressure drop in chromatography.
- To detail the correlation between the organization of particle-based chromatographic media and pressure drop.
- To explore the extension of these correlations to convective media and novel 3D printed materials, and to present methods for estimating adsorbed layer thickness from pressure drop data.
Main Methods:
- Review of existing literature on pressure drop in chromatography.
- Analysis of factors affecting pressure drop, including media compressibility, sample characteristics, and flow regimes.
- Correlation of particle-based media organization with pressure drop, extended to membranes, monoliths, and 3D printed media.
- Development and discussion of methods for estimating adsorbed layer thickness using pressure drop data.
Main Results:
- Identified key parameters influencing pressure drop: media compressibility, sample properties, and mobile phase flow regime.
- Established detailed correlations between the structural organization of chromatographic media (particles, membranes, monoliths, 3D printed) and observed pressure drop.
- Demonstrated the utility of pressure drop data for estimating the thickness of adsorbed layers on chromatographic media.
Conclusions:
- Pressure drop in chromatography is a rich source of information beyond simple flow control.
- Understanding the relationship between media structure, flow dynamics, and pressure drop enhances chromatographic process optimization.
- Pressure drop analysis provides a practical method for characterizing adsorbed layer formation and media performance.
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