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The chromatography technique was first invented in 1901 by Michael S. Tswett, a Russian botanist, to separate plant pigments using organic solvents. Further, in 1941, Archer John Porter Martin and R. L. M. Synge modified the technique by packing silica gel into a column. A mixture of amino acids was then separated on the packed column using chloroform and water mixture as the mobile phase. This was the first report on column chromatography. At present, column chromatography is a widely used...
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Simple In-House Ultra-High Performance Capillary Column Manufacturing with the FlashPack Approach
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Highly efficient capillary columns packed with superficially porous particles via sequential column packing.

James W Treadway1, Kevin D Wyndham2, James W Jorgenson1

  • 1Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3290, USA.

Journal of Chromatography. A
|October 27, 2015
PubMed
Summary

Highly efficient capillary columns were developed using superficially porous particles for ultrahigh pressure liquid chromatography (UHPLC). These columns achieve over 500,000 plates/meter, demonstrating significant potential for advanced chromatographic separations.

Keywords:
Capillary liquid chromatographyColumn packingCore–shell particlesHighly efficient columnSuperficially porous particlesUHPLC

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Area of Science:

  • Analytical Chemistry
  • Chromatography

Background:

  • Ultrahigh pressure liquid chromatography (UHPLC) demands highly efficient separation columns.
  • Superficially porous particles offer advantages in mass transfer kinetics for improved chromatographic performance.

Purpose of the Study:

  • To develop and characterize highly efficient capillary columns packed with superficially porous particles for UHPLC.
  • To evaluate the impact of column internal diameter on column efficiency.

Main Methods:

  • Packing of fused silica capillary columns (30, 50, 75 μm ID) with ~1.5 μm superficially porous particles.
  • Serial packing technique with packing progress plots for monitoring column preparation.
  • Characterization of column efficiency using hydroquinone as a test analyte.

Main Results:

  • Achieved minimum reduced plate heights as low as 1.24, indicating high column efficiency.
  • Demonstrated over 500,000 plates/meter for the most efficient 30 μm ID column.
  • All investigated column diameters yielded highly efficient columns (minimum reduced plate height < 2), with smaller diameters showing greater efficiency.

Conclusions:

  • Confirms the feasibility of creating highly efficient capillary UHPLC columns using superficially porous particles.
  • Highlights the significant efficiency potential of superficially porous particles in packed-bed chromatography.
  • Small internal diameter columns packed with superficially porous particles represent a promising avenue for ultra-high efficiency separations.