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terry_well
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°®ÓëÓêÏÂ(½ð±Ò+1): 2011-12-20 22:02:31
zivi(½ð±Ò+15, ·ÒëEPI+1): лÁË 2011-12-21 10:52:35
°®ÓëÓêÏÂ(½ð±Ò+1): 2011-12-20 22:02:31
zivi(½ð±Ò+15, ·ÒëEPI+1): лÁË 2011-12-21 10:52:35
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ADS-7 absorptive resin was selected to extract stevia from leaching solution of Stevia leaf. AB-8 resin was used to absorb stevioside, in which a light yellow crude Stevia was obtained by drying the eluate first, and then a high purity stevia was prepared by recrystallization method in 99% ethanol. Stevioside could be absorbed by AB-8 resin it could be further desalted and decolorized by using ion exchange resin, based on which a yellow stevioside could be obtained by freeze-drying process. It will be better to take recrystallization using organic solvent such as ethanol. ÊÔÁËһϣ¬½ö¹©²Î¿¼¡£ |

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