An adhesive hydrogel functionalized silica sphere for polar analytes separation and analysis

Area of Science:

• Analytical Chemistry
• Materials Science
• Chromatography

Background:

• Chromatographic separation of polar compounds presents significant challenges.
• Hydrogels offer unique properties like functional designability and multiple interaction sites for stationary phase development.

Purpose of the Study:

• To develop a novel stationary phase for enhanced separation of polar compounds.
• To synthesize and characterize a hydrogel-functionalized silica stationary phase (Sil@PVA/TA).

Main Methods:

• Physical coating technique was employed to synthesize the Sil@PVA/TA stationary phase.
• The stationary phase was characterized for its separation performance and efficiency.
• Comparative analysis with bare silica, diol, NH2, and C18 columns was conducted.

Main Results:

• The Sil@PVA/TA phase demonstrated excellent separation performance and high column efficiency (71385.6 plates/m for thymidine).
• It exhibited superior selectivity for various polar molecules including nucleosides, bases, alkaloids, organic acids, antibiotics, and amino acids compared to conventional columns.
• Significantly improved peak shape for alkaloids was observed compared to the C18 column.

Conclusions:

• A novel hydrogel-functionalized silica stationary phase (Sil@PVA/TA) was successfully synthesized.
• This new material provides an effective solution for the separation and analysis of challenging polar compounds.
• The Sil@PVA/TA phase represents a promising advancement in chromatographic techniques.