María José Otero Pareja

Ms. María José Otero Pareja


Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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26 May 2015 in Molecules
Verified
Journal Article
Open access
PDF file
MPMaría José Otero Pareja
María José Otero Pareja
LCLourdes Casas Cardoso
Lourdes Casas Cardoso
MPMaría Teresa Fernández Ponce
María Teresa Fernández Ponce
Casimiro MantellCasimiro Mantell
Casimiro Mantell
EOEnrique J. Martínez de la Ossa
Enrique J. Martínez de la Ossa
The extraction yield, phenolic content, anthocyanin content and antioxidant activity of extracts from different varieties of red grapes, Cabernet Sauvignon, Merlot, Petit Verdot, Syrah, Tempranillo and Tintilla, using pressurized green solvents have been analyzed. Two techniques were studied and compared: supercritical fluid extraction (SFE) with CO2 + 20% ethanol and pressurized liquid extraction (PLE) with either ethanol, water or an ethanol/water mixture as the extraction solvents. The Petit Verdot variety allowed the highest global and phenolic yield, and antioxidant activity. The best conditios for PLE obtained from the experimental design and kinetic study were 50% ethanol/water as the pressurized solvent at 90 bar, 120 °C, a flow rate of 5 g/min and, an extraction time of 90 min. A statistical analysis of variance has been performed and it was found that temperature is the only variable that has a statistical influence on the extraction yield. The antioxidant activity levels of the extracts are very promising and they are similar to those obtained with the antioxidant tocopherol.