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Structure analysis of carboxymethyl starch by capillary electrophoresis and enzymic degradation

: Tüting, W.; Albrecht, G.; Volkert, B.; Mischnick, P.


Starch = Stärke 56 (2004), No.7, pp.315-321
ISSN: 0038-9056
Journal Article
Fraunhofer IAP ()

Carboxymethyl starches (CMS) with a degree of substitution (DS) in the range of 1.2 to 1.5 were analysed by capillary electrophoresis (CE) after hydrolysis and reductive amination in a borate buffer. The monomer composition determined was compared to data calculated by the statistical models of Spurlin and Reuben. In addition, the starch derivatives were exhaustively degraded by alpha-amylase and amyloglucosiclase and the amount of glucose liberated was determined. Results were discussed with regard to derivatisation conditions and properties of the carboxymethyl starches.