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黄芩甙是从唇形科植物黄芩中提取出的一种成分,一般认为它是以镁盐形式存在于植物中,可溶于水。因此,可用水为溶媒进行提取,然后利用黄芩甙在酸性条件下析出,在碱性条件下溶解的特性,以等量乙醇处理,进行酸碱法提取。但是,在提取中当调pH 超过7.0以上加等量95%乙醇时,往往出现大量红色-红棕色胶团(粒),有些单位当杂质除去,使收得率降低。为此,我们对红色胶团的性质进行探讨,同时将此法与原酸碱法进行比较,并将此两法重新组合成一新的工艺流程进行对照。
Astragalus membranaceus is a component extracted from the labia scutellariae. It is generally believed that it is present in the plant as a magnesium salt and is soluble in water. Therefore, water can be used as a solvent for extraction, and then use the characteristics of Astragalus membranaceus under acidic conditions, dissolved in alkaline conditions, the same amount of ethanol treatment, acid-base extraction. However, when the pH is adjusted to more than 7.0 and the same amount of 95% ethanol is added during the extraction, a large amount of red-reddish-brown micelles (granules) often appear, and some units remove the impurities and reduce the yield. For this purpose, we discussed the nature of the red micelles, compared it with the original acid-base method, and recombined these two methods into a new process flow for comparison.