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Post Column Derivatization Using Reaction Flow High Performance Liquid Chromatography Columns
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Published on: April 26, 2016

Spiral countercurrent chromatography.

Yoichiro Ito1, Martha Knight, Thomas M Finn

  • 1Laboratory of Bioseparation Technology, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bldg.10, Room 8N230, 10 Center Drive, Bethesda, MD 20892, USA. itoy2@mail.nih.gov

Journal of Chromatographic Science
|July 9, 2013
PubMed
Summary
This summary is machine-generated.

Modified spiral columns enhance stationary phase retention in high-speed countercurrent chromatography (HSCCC), enabling separations with polar solvent systems previously challenging for coil-based methods.

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Area of Science:

  • Chromatography
  • Separation Science
  • Analytical Chemistry

Background:

  • High-speed countercurrent chromatography (HSCCC) traditionally uses open tubing coils for compound separation.
  • Stationary phase retention in coil-based HSCCC relies on the Archimedean screw effect, limiting its use with polar solvent systems.
  • Polar solvent systems, particularly aqueous-aqueous polymer phases, present challenges for stationary phase retention in conventional HSCCC.

Purpose of the Study:

  • To develop an improved HSCCC system capable of effectively retaining stationary phases in polar solvent systems.
  • To modify the geometry of the separation column to enhance stationary phase retention.
  • To demonstrate the efficacy of the new system for separating peptides and proteins using challenging solvent systems.

Main Methods:

  • Modification of the coiled channel geometry to a spiral configuration to utilize radial centrifugal force.
  • Fabrication of two types of spiral column assemblies: spiral disk and spiral tube.
  • Testing the separation capabilities of the spiral columns with polar two-phase solvent systems.

Main Results:

  • The spiral configuration significantly improved stationary phase retention compared to traditional coil systems.
  • Both spiral disk and spiral tube assemblies demonstrated successful separations.
  • Peptides and proteins were effectively separated using polar solvent systems with high stationary phase retention.

Conclusions:

  • Spiral column geometry is a viable solution for overcoming stationary phase retention limitations in HSCCC with polar solvents.
  • The developed spiral columns offer enhanced performance for separating biomolecules like peptides and proteins.
  • This advancement expands the applicability of HSCCC to a wider range of solvent systems and analytes.