Effect of solvent type and high pressure treatment on the extraction of Gomphrena globosa L. bioactive compounds

• Type: Article in International Conference Proceedings Book
• Date: 2017

Authors

Fernandes, L (Author) Other; Ramalhosa, E (Author) Other; Pereira, JA (Author) Other; Susana Casal (Author) FFUP; Saraiva, JA (Author) Other

Conference proceedings International

Title: JOINT AIRAPT-25TH & EHPRG-53RD INTERNATIONAL CONFERENCE ON HIGH PRESSURE SCIENCE AND TECHNOLOGY, 2015

Joint 25th AIRAPT / 53rd EHPRG International Conference on High Pressure Science and Technology

Madrid, SPAIN, AUG 30-SEP 04, 2015

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Other information

Authenticus ID: P-00N-BRX

DOI: 10.1088/1742-6596/950/4/042004

Abstract (EN): The present study aimed to compare the influence of different extraction solvents (water, methanol, water: acetone (6: 4, v/v)), methods (heating (37 degrees C, 30 min) or high pressure (HP) (300 or 500 MPa) and extraction time (7.5 or 15 min)) on flavonoids, hydrolysable tannins and antioxidant activity (Total Reducing Capacity (TRC), DPPH Free Radical Scavenging Activity and Reducing Power) of Gomphrena globosa L. flower extracts. The water: acetone extracts obtained by heating had the highest values of flavonoids, hydrolysable tannins and antioxidant activity. When applying HP, variable results were obtained. Still, the application of HP to water allowed to extract more hydrolysable tannins, as well as to obtain extracts with higher antioxidant activity than with heating, but no significant alterations were observed with methanol. In conclusion, both solvent and extraction method influence the content of bioactive compounds, being HP treatment a promising method to obtain enriched aqueous extracts in line with the principles of green-chemistry.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6