Study on soybean oligosaccharide separated from soy molasses

To extract soybean oligosaccharides from soy molasses,the best culture medium of extracted soybean oligosaccharides was confirmed by investigated the single factor and orthogonal experiments.To obtain the best purity of soybean oligosaccharides,ultrafiltration was used to eliminate soybean whey of soybean oligosaccharides.The results showed:the ratio of samples to solvent was 30:1(mL/g),the temperature of extraction was 50℃,the concentration of ethanol was 95%,the time of ethanol extraction was 2h.The extraction rate of this method was 55.0%,the yieid of the production was 66.3%,the purity of soybean oligosaccharides by ultrafiltration was 72.2%.