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《Journal of Jilin University(Science Edition)》 2006-04
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Ethanol-alkali Extraction Method of Astragalus Polysaccharides

TIAN Luo~1,XUAN Yi-fang~1,FAN Rong-jun~1,JIANG Yun-lei~2,XING Ming~1,LIU Li-dong~1,CHEN Xia~1(1.College of Life Science,Jilin University,Changchun 130021,China;2.College of Animal Technology,Jilin Agricultural University,Changchun 130018,China)  
This paper deals with the ethanol-alkali extraction method of astragalus polysaccharides,by which the effects of five extraction factors including pH of extraction solvent,the ratio of material to extraction(solvent,)(extraction time,) extraction temperature and ethanol concentration of extraction solvent on the rate of extraction were studied.The extraction rate of(astragalus) polysaccharides extracted by ethanol-alkali(extraction method) was compared with those of water extraction method and alkali extraction method and the content of(astragalus)(polysaccharides) extracted by ethanol-alkali extraction method was detected by ultraviolet (spectrophotometry) and infrared spectrometry.The results show that the extraction rate of ethanol-alkali(extraction) method is(19.15%,)(3.53) times that of water extraction method and(2.63) times that of alkali(extraction) method,the(residue) of the efficiency components of ethanol-alkali extraction method is less than those of the other methods.
【Fund】: 吉林省科技厅中药现代化重大项目基金(批准号:20030906-01)
【CateGory Index】: R284
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