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Supercritical Carbon Dioxide Extraction and Characterization of Argentinean Chia Seed Oil
Author(s) -
Ixtaina Vanesa Y.,
Mattea Facundo,
Cardarelli Damián A.,
Mattea Miguel A.,
Nolasco Susana M.,
Tomás Mabel C.
Publication year - 2011
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/s11746-010-1670-2
Subject(s) - supercritical carbon dioxide , extraction (chemistry) , yield (engineering) , solubility , carbon dioxide , supercritical fluid , chemistry , chromatography , supercritical fluid extraction , bar (unit) , materials science , organic chemistry , physics , meteorology , metallurgy
Extraction of chia seed oil was performed with supercritical carbon dioxide (SC‐CO 2 ). To investigate the effects of pressure and temperature on the oil solubility and yield, two isobaric (250 and 450 bar) and two isothermal (40 and 60 °C) extraction conditions were selected. The global extraction yield of chia oil increased with pressure enhancement, but temperature had a little influence on it. The maximum oil recovery using SC‐CO 2 at a mass flow rate of 8 kg/h was 97%, which was obtained at 60 °C, 450 bar for a 138‐min extraction. The results showed that solubility changed from 4.8 g oil/kg CO 2 at 60 °C–250 bar to 28.8 g oil/kg CO 2 at 60 °C–450 bar. The final extract obtained by SC‐CO 2 under different conditions and Soxhlet extraction contained mainly α‐linolenic (64.9–65.6%) and linoleic (19.8–20.3%) acids. SC‐CO 2 extraction is an interesting alternative methodology because it is possible to achieve a chia oil yield close to that obtained by conventional extraction with a similar fatty acid composition using an environmentally friendly process.