he extraction of phenolic compounds from grape marc using supercritical CO2 containing 15% ethanol-water mixture (57%, v/v) (EtW) as co-solvent, at 8, 10, 20 and 30 MPa/313.15 K suggested 8 MPa as the most suitable pressure. At 8 MPa/313.15 K, different co-solvent percentages (15, 10, 7.5%) at CO2 flow rate of 6 and 4 kg/h were investigated for proanthocyanidins (PAs) the extraction. The highest extraction yields were obtained at 4 kg/h CO2-7.5% EtW flow rate (2600 mgGAE 100 gDM-1) and 6 kg/h CO2-10% EtW (2527 mgGAE 100 gDM-1). At 6 kg/h CO2-10% EtW flow rate the amounts of monomeric (188 mg catechin 100 gDM-1) and oligomeric (154 mgcatechin 100 gDM-1) fractions of PAs, as well as their antioxidant activity (809 and 546 mgα-tocopheroll 100 gDM-1) were higher than at 4 kg/h CO 2-7.5% EtW-flow rate. SC-CO2 methods were compared with conventional methanol extraction

Extraction of proanthocyanidins from grape marc by supercritical fluid extraction using CO2 as solvent and ethanol-water mixture as co-solvent

DA PORTO, Carla;NATOLINO, Andrea;DECORTI, Deborha
2014-01-01

Abstract

he extraction of phenolic compounds from grape marc using supercritical CO2 containing 15% ethanol-water mixture (57%, v/v) (EtW) as co-solvent, at 8, 10, 20 and 30 MPa/313.15 K suggested 8 MPa as the most suitable pressure. At 8 MPa/313.15 K, different co-solvent percentages (15, 10, 7.5%) at CO2 flow rate of 6 and 4 kg/h were investigated for proanthocyanidins (PAs) the extraction. The highest extraction yields were obtained at 4 kg/h CO2-7.5% EtW flow rate (2600 mgGAE 100 gDM-1) and 6 kg/h CO2-10% EtW (2527 mgGAE 100 gDM-1). At 6 kg/h CO2-10% EtW flow rate the amounts of monomeric (188 mg catechin 100 gDM-1) and oligomeric (154 mgcatechin 100 gDM-1) fractions of PAs, as well as their antioxidant activity (809 and 546 mgα-tocopheroll 100 gDM-1) were higher than at 4 kg/h CO 2-7.5% EtW-flow rate. SC-CO2 methods were compared with conventional methanol extraction
File in questo prodotto:
File Dimensione Formato  
supflu_2880.pdf

non disponibili

Tipologia: Documento in Post-print
Licenza: Non pubblico
Dimensione 632.96 kB
Formato Adobe PDF
632.96 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11390/871329
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 64
  • ???jsp.display-item.citation.isi??? 58
social impact