Antiradical activity of plant extracts obtained in subcritical water
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A method for preparing plant extracts with antiradical activity in a subcritical water medium is proposed. The method makes it possible to extract from plant material in subcritical water up to 38% of substances of various chemical natures, such as phenolic compounds, without using toxic organic solvents. The method is tested by the example of preparing extracts from blood-red hawthorn (Crataegus sanquinea Pall.), heart-shaped linden (Tilia cordata Mill.), sand immortelle (Helichrysum arenarium L.), chamomile (Matricaria recutita L.) and touch-and-heal (Hypericum perforatum L.). It is shown that the aqueous and ethanol fractions of plant extracts have comparable antiradical activity, as assessed using their reaction with diphenylpicrylhydrazyl radical.
Keywordssubcritical water extraction phenolic compounds flavonoids antiradical activity diphenylpicrylhydrazyl
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