Simplified Synthesis of Poly(ethyleneimine)-Modified Silica Particles and Their Application in Oligosaccharide...

Area of Science:

• Analytical Chemistry
• Materials Science
• Biochemistry

Background:

• Oligosaccharide isolation and purification present significant challenges in natural product and traditional Chinese medicine research.
• Current separation techniques often struggle with the complexity of oligosaccharide mixtures.

Purpose of the Study:

• To develop novel polymer-modified stationary phases for enhanced oligosaccharide separation.
• To compare the performance of two synthesized materials, Sil-epoxy-PEI and Sil-chloropropyl-PEI, in chromatographic separations.

Main Methods:

• Synthesis of Sil-epoxy-PEI and Sil-chloropropyl-PEI materials using distinct methods.
• Comprehensive characterization using SEM-EDX, FTIR, TGA, zeta potential, and surface area analysis.
• Application in stainless-steel columns for the separation of nucleotide/nucleoside molecules and oligosaccharides in HILIC mode.

Main Results:

• Both synthesized materials were successfully prepared and characterized.
• The Sil-epoxy-PEI column achieved higher resolution in separating nucleotide/nucleoside molecules and oligosaccharide mixtures compared to the Sil-chloropropyl-PEI column.
• The developed stationary phase outperformed existing HILIC materials like hydrothermal carbon and amide columns.

Conclusions:

• Sil-epoxy-PEI and Sil-chloropropyl-PEI are effective stationary phases for oligosaccharide separation.
• Sil-epoxy-PEI offers superior chromatographic performance, addressing challenges in natural product and TCM analysis.
• This advancement provides a promising tool for the pharmacological study of oligosaccharide monomers.