Preparative Methods for 1,6-Anhydro Hexoses

VI. Anhydro Sugars of the Glycosan Type 1. Preparative Methods for 1,6-Anhydro Hexoses... 

Wheat pentosans were dehydrated to furfural with concentrated HC1, and the furfural was dissolved in dibutyl ether in preparation for GC (Folkes, 1980). This method is claimed to be specific, accurate, and precise for pentoses and pentosans (Folkes, 1980), because 5-hydroxymethylfurfural is not produced, as is the case in hexose decomposition. Previously, furfural was distilled and analyzed colorimetrically. Alkalization increases the yield of 1-, 2-, and 3-carbon, vapor-phase compounds at the expense of anhydro sugars and furans (Ponder and Richards, 1993). Hydrolysis-GC is adaptable to the estimation of DP (Morrison, 1975) applicability to carbohydrates is limited to oligomers with DP = 6 (Traitler et al., 1984). 

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