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Extraction, separation and isolation of essential oils from natural matrices by supercritical CO 2
Author(s) -
Marongiu Bruno,
Piras Alessandra,
Pani Federica,
Porcedda Silvia,
Ballero Mauro
Publication year - 2003
Publication title -
flavour and fragrance journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 70
eISSN - 1099-1026
pISSN - 0882-5734
DOI - 10.1002/ffj.1258
Subject(s) - chemistry , supercritical fluid extraction , supercritical fluid , supercritical carbon dioxide , extraction (chemistry) , chromatography , essential oil , wax , separator (oil production) , organic chemistry , physics , thermodynamics
Dried and ground leaves of different plants from Sardinia (Italy), such as Inula viscosa (L.) Aiton and Inula graveolens (L.) Desf., were used for supercritical extraction with carbon dioxide (CO 2 ) to isolate the corresponding extracts. The vegetable fragrances were isolated from the supercritical extract by means of a fractional separation technique. GC–MS analysis of the extracts allowed identication of the oil constituents. The process was carried out operating at 90 bar and 50 °C in the extraction vessel, at 90 bar and below ‐5 °C in the rst separator to selectively precipitate the cuticular waxes, and at a pressure of 15–20 bar and temperatures in the range 15–21 °C in the second vessel to recover the volatile oil. The hydrodistilled oils showed some important differences. Copyright © 2003 John Wiley & Sons, Ltd.