engleski

Supercritical CO2 extraction and hydrodestillation of Helichrysum italicum flowers

The increasing popularity of Immortelle (Helichrysum italicum (Roth) G. Don) and its products, particularly in cosmetic industry, is evident nowadays. Supercritical CO2 (SC-CO2) extraction is considered as promising alternative to the conventional solvent extraction in food, pharmaceutical and cosmetic industry due to the absence of solvent residue in extracts and better retention of aromatic compounds. SC-CO2 extracts of H. italicum are free of organic solvent residues and suitable for direct use in cosmetic industry. SC-CO2 extraction of H. italicum flowers in this study was performed at different process parameters of pressure and temperature. Hydrodestillation was performed to obtain essential oil. The extracts were analysed by GC-MS and tremetone derivatives dominated: bitalin A, 12- acetoxytremetone, gnaphaliol, 1-[2-(2-methyl- 2, 3-dihydroxypropyl)-2, 3-dihydro-1- benzofuran- 5-yl]ethanone, isobutyl bitalin A and 1-[2- (acetylprop-1-en-2-yl)-3-hydroxy-2, 3-dihydro-1- benzofuran-5-yl]ethanone. Striking differences were found among the essential oil and SC-CO2 extracts composition. The major oil compounds were γ-curcumene, α-pinene, β- selinene, α- selinene and limonene. Mono- and sesquiterpene were found among minor constituents of the extracts. Neryl acetate was present in the extracts and essential oil.

GC-MS profiles ; Helichrysum italicum ; hydrodestillation ; supercritical CO2 extraction

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