Extraction of the phenolic fraction contained in artichoke leaves was investigated by using Subcritical Water, and the influence of water temperature and pH was studied over the range 110-180°C and 2.3-5.7, respectively. A significant influence of the extraction parameters was observed and the association of high temperatures and high pH had a negative impact on the extraction yields. Chlorogenic acid showed to be prone to degradation at higher temperatures and good phenolics extraction yields could be obtained at intermediate pH and temperature values, were recoveries of 50, 300, 120 and 30% could be obtained, for chlorogenic acid, cynarin, luteolin and apigenin.
Subcritical Water Extraction of Phenolics from Artichoke (Cynara scolymus L.) Byproducts
FAVATI, Fabio;PIETRAFESA, Angiolina;D'ANTUONO, Isabella;GALGANO, Fernanda
2005-01-01
Abstract
Extraction of the phenolic fraction contained in artichoke leaves was investigated by using Subcritical Water, and the influence of water temperature and pH was studied over the range 110-180°C and 2.3-5.7, respectively. A significant influence of the extraction parameters was observed and the association of high temperatures and high pH had a negative impact on the extraction yields. Chlorogenic acid showed to be prone to degradation at higher temperatures and good phenolics extraction yields could be obtained at intermediate pH and temperature values, were recoveries of 50, 300, 120 and 30% could be obtained, for chlorogenic acid, cynarin, luteolin and apigenin.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
