Polysaccharide analysis: resolving surface heterogeneity

In biopharmaceutical products and products based on polysaccharides, surface heterogeneity can affect performance, stability, batch-to-batch reproducibility, and quality compliance. Manufacturers face issues related to structural variability, molecular weight distribution, purity, the presence of organic impurities, fragments, aggregates, or chemical modifications that may alter the product profile. The challenge is to link surface and structural characteristics to performance properties in order to accelerate R&D, strengthen quality control, and document differences between compliant and non-compliant batches.

A heterogeneous surface may reflect differences in composition, chain length, crosslinking level, charge, purity, or the presence of synthesis residues. In the case of hyaluronic acid or other polysaccharides of biopharmaceutical interest, these variations can modify viscosity, viscoelastic properties, solubility, solution stability, or interaction with the formulation environment. They can also make it more difficult to compare raw material, finished product, and competitor product.

Characterization of a polysaccharide may include monosaccharide composition, molecular weight analysis by SEC/GPC, aggregate quantification by size exclusion chromatography, charge variant analysis by IEX-UV, as well as the identification and quantification of impurities, fragments, or chemical modifications by HPLC-HRMS/MS and LC-HRMS. Depending on the need, we also perform targeted compound assays, trace analysis, identification of unknown impurities, comparison of chromatographic profiles, and study of compliant versus non-compliant batches.

Filab supports manufacturers with a pragmatic approach based on understanding the need, selecting the most relevant techniques, and cross-interpreting the results. Our added value lies in our ability to investigate complex matrices, develop tailor-made methods, identify unknown compounds, and compare analytical profiles to objectively assess non-conformity or formulation changes.

Our laboratory supports biopharmaceutical players in Polysaccharide Analysis and in solving complex issues related to surface heterogeneity. Our teams design analytical strategies tailored to the matrix, development objectives, and industrial requirements: structural elucidation, monosaccharide composition, purity and homogeneity assessment, contaminant identification, targeted impurity quantification, batch comparison studies, and the development of specific methods. This approach provides actionable data for release testing, deviation investigations, and formulation optimization.

For manufacturers, the consequences are concrete: supplier qualification difficulties, analytical non-conformities, batch instability, the need for de-formulation, investigation of unknown impurities, or validation of a specific assay method. A well-designed analytical strategy makes it possible to identify root causes, prioritize quality risks, and guide corrective actions. In addition, approaches such as Surface Tension or Surface Wear can enrich the interpretation depending on the nature of the product studied.

Our capabilities include separation techniques, high-resolution mass spectrometry, and physicochemical characterization to link structure and product behavior: SEC/GPC, HPLC, IEX-UV, LC-HRMS, HPLC-HRMS/MS, DSC, viscosity measurements, and viscoelastic properties. This complementarity is essential in biopharmaceutical analysis to establish a reliable analytical profile. For related needs, our content on Biopharmaceutical Peptide Identification and on Our Equipment For Surface Characterization And Failure Analysis provides an overview of the range of resources available.

This expertise is particularly useful for the development of injectable products, gels, polysaccharide-based devices, or critical raw materials. Our teams work on hyaluronic acid assay issues, search for crosslinking residues, contaminant identification, fragment studies, physicochemical property characterization, and understanding of surface/product interactions. Depending on the case, complementary readings such as Nanomaterials Industrial Coatings can also shed light on surface and interface challenges.

To kick off your project, you need to define the matrix, the development context, the target quality criteria, and the expected level of characterization. We can then build a tailor-made analytical program: analyze composition and purity, compare multiple batches, identify an impurity, develop an assay method, characterize physicochemical properties, and interpret the observed differences. Our support is designed to turn a complex analytical question into actionable decision-making data for R&D, production, and quality assurance.