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Related Experiment Videos

Bonded dimethylacrylamide as a permanent coating for capillary electrophoresis.

H Wan1, M Ohman, L G Blomberg

  • 1Department of Chemistry, Karlsrad University, Sweden.

Journal of Chromatography. A
|August 28, 2001
PubMed
Summary
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Chemically bonded polydimethylacrylamide coatings for capillary electrophoresis (CE) offer high separation efficiency and stability. These new CE capillaries demonstrate excellent performance in separating diverse biomolecules.

Area of Science:

  • Analytical Chemistry
  • Separation Science
  • Chromatography

Background:

  • Capillary electrophoresis (CE) is a powerful separation technique.
  • Capillary coatings are crucial for improving separation efficiency and stability in CE.
  • Polydimethylacrylamide (PDMA) is a polymer with potential for capillary coating.

Purpose of the Study:

  • To develop a method for coating capillaries with chemically bonded polydimethylacrylamide.
  • To evaluate the properties and performance of these coated capillaries for CE applications.

Main Methods:

  • Chemical bonding of polydimethylacrylamide to capillary inner surfaces.
  • Evaluation of separation efficiency using cytochrome c.
  • Assessment of electroosmotic flow (EOF) at different pH levels.

Related Experiment Videos

  • Testing capillary stability at high pH.
  • Demonstration of separation capabilities with various biomolecules.

    • Main Results:

    • High separation efficiency achieved, with 1.2 x 10^6 theoretical plates/m for cytochrome c.
    • Stable electroosmotic flow (EOF) observed, ranging from 10 x 10^-10 to 6 x 10^-10 m^2 V^-1 s^-1 at pH 8.0.
    • Excellent capillary stability demonstrated, with over 150 runs possible at pH 10 without significant performance degradation.
    • Successful separation of diverse analytes, including basic and acidic proteins, derivatized amino acids, and peptides.

    Conclusions:

    • Chemically bonded polydimethylacrylamide coatings provide a robust and efficient solution for capillary electrophoresis.
    • The developed coated capillaries exhibit high separation performance and remarkable stability, making them suitable for complex biological sample analysis.