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《Journal of Anhui Agricultural Sciences》 2010-10
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Research on Extraction Methods of Polysaccharide from Onion

HUANG Ai-min et al (School of Chemistry and Chemical Engineering,Guangxi University,Nanning,Guangxi 530004)  
[Objective] To improve the extraction technology of polysaccharides from onion.[Method] The extraction methods of polysaccharide from onion were studied by orthogonal experiments with hot water extraction method.The effect factors including extraction time,temperature and the ratio of solid-liquid on the extraction rate were investigated.Furthermore,the ultrasonic assisted extraction methods was investigated to promote the extraction rate.[Result] The optimum extracting process of polysaccharide from onion with hot water extraction method was showed as following:extracting 3 times,4 h every time,extracting temperature at 60 ℃,the ratio of solid-liquid at 1:30,and the extraction rate of polysaccharide was up to 4.034%.Using the optimum extracting process above,ultrasonic frequency at 59 kHz,power at 112 W and extraction time in 30 minutes,the extraction rate of polysaccharide was up to 6.052% with these ultrasonic outfield intensifying conditions.The extraction time of the ultrasonic assisted extraction methods was also decreased by 4 h.Outfield intensifying ultrasound treatments could increase in the efficiency of extracting polysaccharide from onion.[Conclusion] These results provided the theoretic basis for the extraction technology of polysaccharides from onion.
【CateGory Index】: R284.1
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