[The analysis of polysaccharides used as food additives. VIII. Simple qualitative and semiquantitative procedures for the determination of alginates in food].
For a rapid and specific assay of alginate, the isolated polysaccharide is split by methanolic hydrochloric acid, the reaction products are separated on silica gel plates and visualized by an uronic acid specific naphthoresorcinol-hydrochloride acid reagent. With the solvent ethylacetat/tert. butanol/water (68 + 23 + 9, v/v/v) the Rf-values of the hydrolysis compounds of alginate differ distinctly from those of the other uronic acids, which are constituents of commercial polysaccharides. The method had been tested successfully on a series of different foods (e.g. propyleneglycol alginate in beer).
D000464:Alginates / Q000032:analysis*; D001515:Beer / Q000032:analysis; D002855:Chromatography, Thin Layer; D005503:Food Additives / Q000032:analysis*; D011134:Polysaccharides / Q000032:analysis; D011409:Propylene Glycols / Q000032:analysis
D000464:Alginates; D005503:Food Additives; D011134:Polysaccharides; D011409:Propylene Glycols
Beiträge zur Analytik der als Lebensmittelzusatzstoffe verwendeten Polysaccharide. VIII. Einfache qualitative und semiquantitative Bestimmung von Alginat in Lebensmitteln.