Fig. 2.

Characterization of five polysaccharide fractions. HPGPC chromatogram (A). The peaks with a retention time of about 46 min were created by the mobile phase. Ion chromatogram (B). 1. fucose; 2. galactosamine; 3. rhamnose; 4. arabinose; 5. glucosamine; 6. galactose; 7. glucose; 8. N-Acetyl-d-Glucosamine; 9. xylose; 10. mannose; 11. fructose; 12. ribose; 13. galacturonic acid; 14. guluronic acid; 15. glucuronic acid; 16. mannuronic acid. FT-IR spectrum (C). UV–vis spectrum (D). Maximum absorption wavelength of the Congo red–polysaccharide complex at various concentrations of NaOH (E). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)