FIELD: chemistry of carbohydrates. SUBSTANCE: method comprises treating fresh or freshly frozen or dry algae with solvents to remove low-molecular substances, extracting polysaccharides ture and with water at 56-60 C. Separation of laminarans and fuchsidans and subsequent fractionation thereof are carried out using hydrophobic chromatography. The resulting polysaccharide extracts are applied separately onto columns. Hydrophobic sorbent is polychrome-1. EFFECT: simplified process and increased yield of the desired product. 4 cl, 2 dwg, 4 ex, 2 tbl
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