Key words: subcritical water, extraction, phenolic compounds, flavonoids, antiradical activity, diphenilpicrylhydrazyl
A subcritical water extraction method for production of vegetable extracts possessing an antiradical activity is suggested. The major advantages of the method are (a) the possibility of extraction of up to 38 % of active substances of various chemical nature, including phenolic compounds, and (b) the absence of toxic organic solvents. The method is tested by producing extracts from Crataegus sanquinea Pall., Tilia cordata Mill., Helichrysum arenarium L., Matricaria recutita L. and Hypericum perforatum L. It is demonstrated that water- and ethanol-soluble fractions of obtained extracts have comparable antiradical activity measured in the reaction with diphenilpicrylhydrazyl radical.
doi:10.1134/S1990793112070032