Development of green extraction process to produce antioxidant-rich extracts from purple coneflower

ABSTRACT

The present study was conducted to develop subcritical water extraction (SWE) of Echinacea purpurea flowers. The influence of temperature and extraction time on quality of extracts considering total phenols content, total flavonoids content, antioxidant capacity and extraction yield, was determined. Optimized extraction parameters for maximised investigated responses were as follows: 147.56 °C and 8.43 min. The experimental values agreed with the values predicted, thus indicating the adequacy of central composite experimental design for modelling the SWE of bioactive compounds from E. purpurea. Results of the study also highlighted the potential application of E. purpurea subcritical water extracts as a source of valuable bioactive compounds.

KEYWORDS:

• Echinacea purpurea
• subcritical water extraction
• phenolic compounds
• antioxidant activity
• response surface methodology

Supplementary material

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