2009•Natural Product CommunicationsOpen access

Ultrasonically Assisted Extraction of Total Phenols and Flavonoids from Rhodiola Rosea

Jordanka Staneva, Milka Todorova, Neyko Neykov, Ljuba Evstatieva

Abstract

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.

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Key concepts: Phenols, Chemistry, Maceration (sewage), Extraction (chemistry), Solvent, Rhodiola rosea, Salidroside, Chromatography