AZURA® SEC GPC/SEC System Solutions

Importance of the topic

The determination of polymer molecular weight distribution and the efficient cleanup of complex samples are critical in materials development, quality control and environmental or food analysis. Gel permeation chromatography/size exclusion chromatography (GPC/SEC) remains the gold standard for polymer characterization and preparative separations due to its non-destructive nature, broad applicability and high reproducibility.

Objectives and overview

This whitepaper presents the AZURA® SEC family of GPC/SEC system solutions by KNAUER, designed to cover analytical, semi-preparative and cleanup workflows. It aims to demonstrate how modular instrumentation, dedicated software and optimized components meet the diverse requirements of research laboratories, industrial QA/QC and automated sample preparation.

Methodology and Instrumentation

The AZURA SEC platform is based on a high-precision dual-piston isocratic pump, sensitive refractive index (RI) detection and a robust autosampler. Key modules include:

• Pump modules with low pulsation and compatibility with organic and aqueous eluents
• RI detectors optimized for low drift, long-life LEDs and high linear range
• High-capacity autosampler for up to 768 microtiter positions or 108 vials
• Forced-air column thermostat (5–85 °C) for temperature-sensitive separations
• Software packages: ClarityChrom® for analytical GPC/SEC and PurityChrom® for preparative fractionation
• Dedicated columns with tailored pore structures for organic or aqueous polymers

Main results and discussion

Performance evaluation shows flow precision down to 0.04 % RSD, pressure ratings up to 86 MPa and temperature stability within ±0.1 °C. The modular concept enables seamless upgrades from compact analytical setups to high-throughput cleanup systems. Automated GPC cleanup based on EPA, AOAC and EN methods achieves reproducible removal of lipophilic matrix components and enrichment of target analytes.

Benefits and practical applications

• High reproducibility of retention volumes and peak shapes for reliable polymer MWD determination
• Flexible configuration adapts to analytical, semi-preparative and cleanup tasks
• Reduced solvent consumption and operational costs via automatic recycle valves and degassing
• Improved laboratory throughput through unattended fraction collection and automated sample prep
• Broad application range: polymers (synthetic, biopolymers), food additives, adhesives, environmental residues

Future trends and potential applications

Integration of multi-detector arrays (light scattering, viscometry), on-line coupling with mass spectrometry and AI-driven method development will further enhance GPC/SEC capabilities. Miniaturized and microfluidic GPC systems may enable point-of-use polymer screening, while advanced software analytics will facilitate real-time quality control and automated decision-making.

Conclusion

The AZURA® SEC series provides a comprehensive, modular and scalable solution for modern GPC/SEC challenges. Its combination of precise solvent delivery, sensitive detection, automated sampling and intuitive software ensures reliable polymer characterization, preparative separations and sample cleanup across diverse industries.