Gel Filtration Chromatography

Aqueous Size Exclusion Chromatography for Polymer Characterization

Analytical teams in biopharmaceutical and polymer science depend on gel filtration chromatography (GFC) for precise, reproducible separation of proteins, polymers and other biomolecules in aqueous environments. As a critical subset of size exclusion chromatography, GFC enables accurate protein and polymer molecular weight analysis without compromising sample integrity. Shodex™ GFC columns are engineered for high-resolution aqueous size exclusion chromatography (SEC), offering low non-specific interaction, excellent reproducibility, and reliable performance for demanding protein and polymer analyses.

Selecting Advanced GFC Columns for Reliable Aqueous SEC

In advanced SEC, the choice of column technology directly shapes analytical success, especially for biological samples. GFC columns are routinely used for biopharmaceuticals, protein analysis, and related applications, separating proteins, polymers, and biomolecules primarily based on hydrodynamic size. To achieve accurate size-based separation, secondary interactions between analytes and the stationary phase must be minimized. As the sample flows through a porous matrix in an aqueous mobile phase, larger molecules elute first due to exclusion from the pores, while smaller species penetrate the pores and elute later. The critical factor? Column material — polymer-based versus silica-based GFC — which dictates performance characteristics such as pH stability, pore size distribution, and sample recovery. Silica-based columns typically offer a more uniform pore size distribution, while polymer-based columns provide a broader pore size range and greater chemical stability. Modern GFC columns from Shodex are engineered to deliver high-resolution separation with minimal secondary interactions and reliable performance for sensitive biological workflows.

Polymer-Based GFC Columns

Polymer-based GFC columns use a hydrophilic polymer matrix (e.g., Polyhydroxymethacrylate in Shodex columns) designed for aqueous size exclusion chromatography. This design minimizes non-specific interactions, provides excellent pH stability, and enables high sample recovery, making these columns well-suited for water-soluble polymers and biopolymers. Shodex polymer-based offerings include the SB-800 and LB-800 series for polymer and polysaccharide analysis, as well as the UB series for larger biomolecules and nanoparticle applications. Use polymer-based columns for:

• Reliable, reproducible analysis of water-soluble polymers and polysaccharides (e.g., hyaluronic acid, dextran, pullulan)
• Biopolymers and macromolecules requiring minimal secondary interactions
• Larger biomolecules and nanoparticles (e.g., extracellular vesicles) using appropriate pore size ranges
• Operation across a wide pH range (low to high pH buffers)

Silica-Based GFC Columns

Silica-based GFC columns use a porous silica particle matrix with a more uniform pore size distribution, enabling high-efficiency separations. These columns offer excellent mechanical strength and are well-suited for higher-pressure operation. Shodex silica-based offerings, such as the PROTEIN KW series and LW series, are commonly used for protein and biomolecule analysis, where optimized pore structure and separation efficiency are critical. While silica-based columns may exhibit higher secondary interactions compared to polymer-based materials, these effects can often be mitigated through appropriate mobile phase conditions (e.g., salt concentration and pH). Select silica-based columns when:

• Analyzing proteins and biomolecules requiring high-resolution separation
• High-efficiency separations with uniform pore structure are needed
• Methods specify silica-based SEC columns
• Higher-pressure operation or mechanical robustness is required

Common Applications for Aqueous Gel Filtration Chromatography Columns

GFC is indispensable across numerous sectors, serving as the gold standard for:

• Biopharmaceutical analysis: Characterizing antibodies, vaccines and therapeutic proteins for molecular weight, purity and aggregation.
• Protein characterization: Investigating aggregation, monitoring formulation stability and performing rigorous quality control.
• Advanced materials research: Analyzing water-soluble polymers, polysaccharides and nanoparticles with precision.

Application-driven selection of buffers and solvents ensures compatibility with a wide range of biological and synthetic samples.

Why Trust Shodex for Your GFC and Aqueous SEC Needs?

For over 50 years, Shodex has set the benchmark in chromatography, earning the trust of research and development leaders globally. Our polymer-based columns deliver industry-leading reproducibility and ultra-low protein adsorption, backed by an extensive application library featuring real chromatograms and proven results. With Shodex, you get direct access to seasoned chromatography experts who can guide you to the optimal solution for any SEC challenge.

Find Your Ideal GFC Column

Shodex understands the critical demands of your laboratory and can help you find the right GFC column for advanced protein and polymer analysis. Whether you need the robust versatility of the  OHpak SB-800 series for polymer analysis, the UB series for bionanoproducts and preparative workflows, or the dedicated protein capabilities of the PROTEIN KW series, our polymer and silica-based columns deliver the results you need. Unsure which column best fits your application? Our experienced technical team is here to help. Contact us for tailored, expert guidance that ensures your next run is a success.