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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >Extractions of ginsenosides from ginseng roots with liquid ammonia, methanol-water or water [German]
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Extractions of ginsenosides from ginseng roots with liquid ammonia, methanol-water or water [German]

机译：用液氨，甲醇水或水从人参根中提取人参皂甙[德语]

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摘要

Extractions of ginsenosides from ginseng roots with liquid ammonia, methanol/water (60:40; v/v) or water were carried out. The extracts have been analyzed qualitatively and quantitatively to valuate yield and selectivity of extractions of ginsenosides. Water supplied the lowest yield. The yields of extracts with liquid ammonia were higher than those with methanol-water (60%). Yields of the ginsenosides Rb-1, Rb-2, Rc and Rd by extracting with liquid ammonia are about twice as much as those of the extraction with methplnol-water (60%). It was proved by HPLC that malonyl-ginsenosides m-Rb-1, m-Rb-2, m-Rc and m-Rd were converted to the corresponding neutral ginsenosides by extraction with liquid ammonia. Because of high yields of extracts and simultaneous increase of the contents of Rb-1, Rb-2, Rc and Rd the extraction with liquid ammonia is obviously superior to the other extraction methods. Furthermore, ginsenosides from ginseng roots were extracted by alkaline methanol-water (60%) solutions. Alternatively, the extracts of the methanol-water (60%) extraction were treated with sodium hydroxide solution. Both methods convert also the malonyl-ginsenosides to neutral ginsenosides. [References: 10]
机译：用液氨，甲醇/水（60:40; v / v）或水从人参根中提取人参皂苷。已经对提取物进行了定性和定量分析，以评估人参皂苷提取物的收率和选择性。水的产量最低。液氨提取物的收率高于甲醇-水提取物的收率（60％）。用液氨提取的人参皂甙Rb-1，Rb-2，Rc和Rd的收率约为用美索酚-水提取的人参皂甙的收率（60％）的两倍。通过HPLC证明丙二酰人参皂苷m-Rb-1，m-Rb-2，m-Rc和m-Rd通过用液氨萃取而转化为相应的中性人参皂苷。由于提取物的高收率和同时增加Rb-1，Rb-2，Rc和Rd的含量，液氨提取明显优于其他提取方法。此外，用碱性甲醇-水（60％）溶液提取人参根中的人参皂苷。或者，用氢氧化钠溶液处理甲醇-水（60％）提取物的提取物。两种方法也将丙二酰人参皂苷转化为中性人参皂苷。 [参考：10]

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