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|Type:||Artigo de periódico|
|Title:||Supercritical CO2 extraction of phenolic compounds from Baccharis dracunculifolia|
|Author:||PIANTINO, Carla R.|
AQUINO, Francisco W. B.
FOLLEGATTI-ROMERO, Luis A.
CABRAL, Fernando A.
|Abstract:||Extracts from Baccharis dracunculifolia leaves were obtained using the following solvents: supercritical carbon dioxide (SC-CO2), ethanol and methanol. Supercritical extraction was carried out at temperatures of 40, 50 and 60 degrees C and pressures of 20, 30 and 40 MPa. Four phenolic compounds were analysed in the extracts by high-performance liquid chromatography: 3,5-diprenyl-4-hydroxycinnamic acid (DHCA or artepillin C); 3-prenyl-4-hydroxycinnamic acid (PHCA); 4-hydroxycinnamic acid (p-coumaric acid) and 4-methoxy-3,5,7-trihydroxyflavone (kaempferide). The global extraction yields (X-0) obtained by the conventional methods with ethanol and methanol were higher than those obtained by SC-CO2. However on analysing the components of interest extracted at 60 degrees C and 40 MPa, the extraction yields of kaempferide, DHCA and PHCA were 156%, 98% and 64% higher, respectively, than in the ethanolic extracts. Only the p-coumaric acid extraction yield was better when extracted using the conventional method. (C) 2008 Elsevier B.V. All rights reserved.|
|Editor:||ELSEVIER SCIENCE BV|
|Citation:||JOURNAL OF SUPERCRITICAL FLUIDS, v.47, n.2, p.209-214, 2008|
|Appears in Collections:||FEA - Artigos e Outros Documentos|
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