This publication investigated the development of analytical tools to determine the purity of extracted fucoidan from brown seaweeds species. Analytical methods were developed, including spectroscopy combined with chemometrics; and the results were compared with those of high performance liquid chromatography (HPLC) and other two chemistry methods (i.e., fucoidan estimation based on fucose content and a cationic dye method based on sulphated polysaccharide estimation). To view this article please click here. Dr Joanna Przyborska is a Research Scientist in the Centre for Applied Bioscience Research, working on a project with the Irish biotechnology company Nutramara Ltd. Joanna obtained her PhD degree (Biological Sciences) at MTU, Kerry and for this publication, Joanna’s work involved extraction, purification and chemical characterisation of biomolecules from brown macroalgae.