Polymer wall coatings for capillary electrophoresis

Area of Science:

• Analytical Chemistry
• Separation Science
• Polymer Chemistry

Background:

• Capillary electrophoresis (CE) relies on stable capillary coatings to control analyte separation.
• Bare fused-silica surfaces in CE can lead to poor reproducibility and peak tailing.
• Polymeric wall coatings offer tunable properties for enhanced CE performance.

Purpose of the Study:

• To review the preparation and properties of dynamic and static polymeric wall coatings for capillary electrophoresis.
• To summarize methods for characterizing these capillary coatings.
• To discuss the advantages and applications of various neutral and charged wall coatings.

Main Methods:

• Literature review of preparation techniques for polymeric wall coatings.
• Summary of characterization methods for capillary coatings (e.g., spectroscopy, microscopy).
• Analysis of properties (neutral, charged) and performance of different coating types.

Main Results:

• Detailed descriptions of methods for preparing both dynamic and static polymeric wall coatings.
• Characterization techniques for assessing coating uniformity, stability, and surface chemistry.
• Overview of neutral and charged coatings, highlighting their distinct properties.

Conclusions:

• Polymeric wall coatings significantly improve capillary electrophoresis performance.
• Tailored coatings offer enhanced selectivity and reproducibility for complex separations.
• Various coating strategies provide versatile solutions for diverse analytical challenges in CE.