Custom degasser optimises accuracy in intrinsic viscosity analysis

A custom-built degasser is helping to improve the precision and reliability of intrinsic viscosity measurements, thanks to a collaboration between analytical instrumentation specialists in Sweden and Spain.

Polymer Char, a leading developer of polymer characterisation systems based in Valencia, Spain, has integrated an optimised DeGASi® unit into its Intrinsic Viscosity analysers. Developed in partnership with Biotech Fluidics AB, the degasser is tailored to the specific flow and detection requirements of relative viscometry.

Dissolved gases, such as oxygen and carbon dioxide, are often present in solvents - even those of laboratory-grade purity. These gases can form microbubbles in response to flow or temperature changes, destabilising detector signals and introducing pressure fluctuations that compromise measurement precision. Degassing removes these gases continuously from the mobile phase, preventing bubble formation and supporting stable, reproducible analysis.

“Even small bubbles can significantly impact the consistency of viscosity readings,” said Alba Cárdenas, Intrinsic Viscosity product expert at Polymer Char. “We turned to Biotech Fluidics because of their expertise in degassing solutions and their flexibility in adapting the technology to our needs. The resulting unit is now an essential part of our system, improving signal-to-noise ratio and ensuring smooth, stable flow - both critical for delivering high-quality data.”

Learn more about Polymer Char’s polymer analysis systems.

Contact Biotech Fluidics, for details on degassing solutions.  

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