it involves the following steps : the release of neutral sugars and hexosamines from biopolymers by resin-catalysed hydrolysis , the nitrous acid deamination of resin-bound hexosamines in this hydrolysate to aldoses , and the determination of these newly formed anhydroaldoses together with the pre-existing neutral sugars as aldononitrile acetates by gas chromatography .
C0005554
biopolymers
C0035191
resin