Staneva Jordanka, Todorova Milka, Neykov Neyko, Evstatieva Ljuba
Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
Nat Prod Commun. 2009 Jul;4(7):935-8.
This work deals with ultrasonically assisted extraction (UAE) of biologically active compounds from rhizomes of Rhodiola rosea, a popular medicinal plant. The influence of temperature, type of solvent and solid/solvent ratio on the yield of total extracts, total phenols and flavonoids was established. The best extraction of total phenols and flavonoids was achieved by using 50% aqueous EtOH and MeOH, respectively. Five times increase of solid/solvent ratio (from 1:20 to 1:100 (w/v)) leads to slow increase of the yield of total phenols and flavonoids. The extraction effectiveness of conventional maceration with 50% EtOH and UAE performed for 1 h at 25 degrees C using the same solvent with respect of total phenols was comparable.
这项工作涉及从流行的药用植物红景天根茎中超声辅助提取（UAE）生物活性化合物。确定了温度、溶剂类型和固液比对总提取物、总酚和黄酮产量的影响。分别使用50%的乙醇水溶液和甲醇实现了总酚和黄酮的最佳提取。固液比增加五倍（从1:20增加到1:100（w/v））导致总酚和黄酮产量缓慢增加。在25℃下使用相同溶剂进行1小时的50%乙醇常规浸渍法和超声辅助提取法对总酚的提取效果相当。
