Microstructure and Physics-Based Structural Models for Suspended Clay-Exopolymer Flocs

Publisher Summary The chemistry and biochemistry of polysaccharides is an area in which chromatographic separation methods are mentioned in almost every communication, and its recent rapid development is indebted mainly to the application of chromatography. There is no general method for the purification of all polysaccharides, and the procedures used in each instance depend on the nature of the particular polysaccharide and on possible contaminants. Some difficulties may arise when separating mixtures that contain several acidic polysaccharides, in which the strongly acidic sulphate group masks other differences in the ionic properties of the polymer and greatly decreases the efficiency of ion-exchange chromatography (IEC) based on these differences. Neutral and acidic polysaccharides formed by Polyporus fomentarius and P. igniarius have been separated by treatment with diethylaminoethyl-cellulose (DEAE-C) on which the latter are adsorbed from aqueous solution and subsequently desorbed by treatment with 2 M potassium acetate solution.

Chapter 23 Polysaccharides

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Chapter 23 Polysaccharides