关键词: 生物质资源, 稻草, 双水相系统, 乙腈, 糖

Abstract: Partition characteristics of straw hydrolysate in an acetonitrile–aqueous two-phase system were investigated in this paper. The formation of an aqueous two-phase system was investigated in detail. The effects of the volumetric ratio between acetonitrile and straw hydrolyzate，and temperature on the distribution coefficient of sugar were studied，respectively. When the volume fraction of acetonitrile was lower than 50%，an aqueous two-phase system could not form in this study. In addition，it was observed that the glucose，reducing sugar，and polysaccharide existed in the upper phase rich in acetonitrile when the ratio of acetonitrile and straw hydrolyzate was equal to 2 or 3，and the experiments temperature was 25 ℃. Especially，when the ratio of acetonitrile and straw hydrolyzate is equal to 3，the yield of glucose extraction was 81.56% in upper phase. When the phase separation experiments were carried out at 0 ℃，only polysaccharide was detected in the upper acetonitrile phase.

Key words: biomass resources, rice straw, aqueous two-phase system, acetonitrile, sugar