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Automated Hydrophobic Interaction Chromatography Column Selection for Use in Protein Purification
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Centrifugal-driven, reduced-dimension, planar chromatography.

Rachel B Strickhouser1, Nahla A Hatab1, Nickolay V Lavrik2

  • 1Department of Chemistry, University of Tennessee, Knoxville, TN, USA.

Electrophoresis
|May 16, 2017
PubMed
Summary
This summary is machine-generated.

Centrifugal force (CF) enhances flow in microfluidic chromatography, improving separation efficiency on novel silicon platforms. This method overcomes limitations of capillary action, enabling faster and more precise analytical separations.

Keywords:
Centrifugal chromatographyPillar arrayUltra-thin layer chromatography

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Area of Science:

  • Analytical Chemistry
  • Microfluidics
  • Chromatography

Background:

  • Capillary action in planar chromatography leads to slow flow rates and band dispersion, limiting efficiency.
  • Existing methods to enhance flow, such as overpressure and electrokinetic techniques, have been applied to thin-layer chromatography (TLC).

Purpose of the Study:

  • To investigate the use of centrifugal force (CF) to drive solvent flow in reduced-dimension planar chromatography platforms.
  • To develop and characterize novel silicon wafer-based platforms for enhanced chromatographic separations.

Main Methods:

  • Fabrication of silicon wafer platforms with continuous 2D pillar arrays using photolithography or metal dewetting and deep reactive ion etching.
  • Coating the platforms with porous SiO2 and utilizing centrifugal force to drive solvent flow.
  • Investigating the influence of spin rate, solvent type, and surface characteristics on flow rates.
  • Analyzing separation performance using fluorescent dyes to determine retardation factors and chromatographic plate height.

Main Results:

  • Achieved flow rates substantially greater than those driven by capillary action alone.
  • Observed unusual co-planar flow patterns both above and within the pillar arrays.
  • Demonstrated low to sub-micrometer chromatographic plate heights, indicating high separation efficiency.
  • Successfully performed the first analytical separations in pillar arrays augmented by CF-driven solvent flow.

Conclusions:

  • Centrifugal force is a viable and effective method to augment solvent flow in micro-scale planar chromatography.
  • The developed silicon wafer platforms with pillar arrays show significant potential for high-efficiency analytical separations.
  • This approach overcomes the inherent limitations of capillary-driven flow, paving the way for faster and more sensitive chromatographic techniques.