Combined Use of Rheometry and GPC/SEC for Characterising Ionic Polysaccharides
Poster Mar 18, 2015
John Duffy, Bernd Schaefer, Bert Postma
The widespread use of ionic polysaccharides like Hyaluronan, Chitosan and Carrageenan in applications as broad as medical, cosmetics and foods generates a demand for ever more detailed and accurate material characterization. Applications require ever higher material specifications, and business need ever leaner production techniques. Shorter consumer product cycles also put pressure on the development teams. This results in requests for shorter development times and more specific information about the materials used.
Rheology and Size Exclusion Chromatography (SEC/GPC) are both well established methods for the characterization of polysaccharide solutions. SEC targets characterization on a molecular scale whereas rheology offers insights into properties on a more macroscopic scale. Linking the results of independent characterization technologies results in a much more complete picture of the samples under investigation. This poster shows how Rheometry and GPC can be used as complementary tools for characterising the behaviour of polysaccharides in solution.
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Pyrolysis-GC/MS is an effective tool in introducing and analyzing polymers. But since the polymer must be broken down to volatile segments in order to be sent to the GC, identification by the Mass Spec does not look at the original polymer, but only the fragments. This poster will look at a unique library designed to work with the existing NIST library, however contains averaged spectra of pyrolyzed polymers so it can be used to directly identify the original polymer sample.READ MORE
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