[Analytical determination of polysaccharide thickening agents for foods--a review (author's transl)].
In this report, the analytical methodology, as developed by the authors for polysaccharides, used as thickening agents in foods is reviewed and summerized. Present additive regulations increase actuality and need for this subject. The analytical methodology consists of the following steps: a) isolation of the polysaccharides from the food samples, b) purification of the polysaccharide, c) determination of the monomeric compounds by thin layer chromatography or by gas chromatography, d) separation into neutral and into acid compounds by ion exchange chromatography on DEAE-Cellulose and e) determination of the types of linkages between monomeric compounds by permethylation.