Extraction of aromatic volatiles by hydrodistillation and supercritical fluid extraction with CO2 from Helichrysum italicum subsp. picardii growing in Portugal

P. Costa*, José Miguel Loureiro, Miguel A. Teixeira, Alírio E. Rodrigues

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Volatiles from Helichrysum italicum subsp. picardii growing in Portugal were extracted by supercritical fluid extraction with CO2 (SFE-CO2) under different conditions of pressure (9 and 12MPa) and particle size (<4mm and 4cm), in order to analyse their influence on the extraction yield, chemical profile, organoleptic properties and antioxidant activity. Hydrodistillation was used as conventional technique for comparison purposes. The results showed that pressure and particle size influenced the yield of SFE-CO2 extraction. Chemical analysis highlighted the abundance of monoterpene hydrocarbons in the essential oil and sesquiterpene hydrocarbons in the SFE-CO2 extracts. In terms of organoleptic properties, the SFE-CO2 extraction allowed the recovery of pleasantly scented fragrances resembling the original scent of the living plant H. italicum subsp. picardii found in Portugal. The SFE-CO2 extracts isolated at 12MPa showed free radical scavenging ability at all tested concentrations. This study allowed the extraction and identification of high-value aromatic components with pleasant fragrance properties suggesting the Portuguese coast as an exploitable source of relevant plant matrices.

Original languageEnglish
Pages (from-to)680-683
Number of pages4
JournalIndustrial Crops and Products
Volume77
DOIs
Publication statusPublished - 23 Dec 2015

Keywords

  • Chemical profile
  • Essential oil
  • Extraction yield
  • Free radical scavenging activity
  • Organoleptic properties
  • SFE-CO extracts

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