Extraction of low-molar-mass phenolics and lipophilic compounds from Pinus pinaster wood with compressed CO₂

E. Conde, J. Hemming, A. Smeds, B.D. Reinoso, A. Moure, S. Willför, H. Domínguez, J.C. Parajó

Research output: Contribution to journalArticleScientificpeer-review

29 Citations (Scopus)

Abstract

Near-supercritical and supercritical CO2 was used to extract low-molar-mass phenolics and lipophilic compounds from Pinus pinaster wood. Extraction of samples containing sapwood and knotwood was carried out at 10-25 MPa and 30-50 degrees C to assess the influence of the operational conditions on the yields of total extracts and phenolics, as well as on the radical scavenging capacity of extracts. The use of ethanol as a co-solvent increased both the extraction yields and the concentration of phenolics in extracts. Operating under selected conditions (25 MPa, 50 degrees C, 10% ethanol), the extraction yield accounted for 4.1 wt% of the oven-dry wood. The extracts contained up to 7.6g of phenolic compounds (measured as gallic acid equivalents) per 100 g extract, and showed one third of the radical scavenging capacity of Trolox. Native resin acids accounted for about 24g per 100 g extracts, whereas flavonoids, lignans, stilbenes and juvabiones were found at lower proportions.
Original languageEnglish
Pages (from-to)193–199
Number of pages7
JournalJournal of Supercritical Fluids
Volume81
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • Lipophilic compounds
  • Phenolic compounds
  • Pinus pinaster
  • Radical scavenging
  • Supercritical CO2

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