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Identification of the products of hydrolysis of carboxymethylcellulose

✍ Scribed by Klaus Niemelä; Eero Sjöström

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
623 KB
Volume
180
Category
Article
ISSN
0008-6215

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✦ Synopsis

Hydrolysis

of carboxymethylcelluloses, made from softwood and hardwood pulps, gave mainly glucose and its mono-and di-substituted derivatives, together with considerable amounts of products derived from hemicellulose constituents. Each hydrolysate contained 2-and 3-0-carboxymethylxylose; mono-and di-substituted mannose derivatives were also detected after hydrolysis of the carboxymethylated softwood pulp. 2,3,6-Tri-0-carboxymethyl derivatives of glucose and mannose were detected in hydrolysates of samples of higher degrees of substitution, and 2,3-di-0-carboxymethylxylose was found only after hydrolysis of hardwoodderived samples. EXPERIMENTAL Materials. -Samples of CMC, prepared either from spruce sulfite or birch sulfate pulps, were commercial products. The degrees of substitution (d.s.) varied from 0.5 to 1. For g.l.c.-m.s., reference samples containing a mixture of CM ethers of *Presented at the 4th European Carbohydrate Symposium, Darmstadt, F.R.G., July 12-17, 1987 'Studies of Carboxymethylcellulose, Part I.

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