Analysis of positions of substitution of O-methyl or O-ethyl groups in partially methylated or ethylated cellulose by the reductive-cleavage method.
A method is described for the analysis of positions of substitution of O-methyl and O-ethyl groups in commercial samples of O-methylcellulose and O-ethylcellulose, respectively. The method requires perethylation of O-methyl-cellulose and permethylation of O-ethylcellulose. Subsequent reductive cleavage of both polymers gives the same eight products, which are analyzed as their O-acetyl derivatives by gas-liquid chromatography.
D'Ambra
A J
AJ
Department of Chemistry, University of Minnesota, Minneapolis 55455.
Rice
M J
MJ
Zeller
S G
SG
Gruber
P R
PR
Gray
G R
GR
D000478:Alkylation; D002482:Cellulose / Q000031:analogs & derivatives*; D002849:Chromatography, Gas / Q000379:methods; D006868:Hydrolysis; D007202:Indicators and Reagents; D008745:Methylation; D008747:Methylcellulose; D010084:Oxidation-Reduction
D007202:Indicators and Reagents; C013517:ethyl cellulose; D002482:Cellulose; D008747:Methylcellulose