Supercritical Carbon Dioxide Extraction and Characterization of Argentinean Chia Seed Oil |
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| Authors: | Vanesa Y Ixtaina Facundo Mattea Damián A Cardarelli Miguel A Mattea Susana M Nolasco Mabel C Tomás |
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| Affiliation: | 1.Facultad de Ciencias Exactas, UNLP,Centro de Investigación y Desarrollo en Criotecnología de Alimentos (CIDCA), (CCT La Plata, CONICET),La Plata,Argentina;2.Dpto. de Ingeniería Química (TECSE), Facultad de Ingeniería,Universidad Nacional del Centro de la Provincia de Buenos Aires (UNCPBA),Olavarría,Argentina;3.Facultad de Ingeniería,Universidad Nacional de Río Cuarto (UNRC), CONICET,Río Cuarto,Argentina;4.Departamento de Ingeniería Química y Tecnología del Medio Ambiente, Facultad de Ciencias,Universidad de Valladolid,Valladolid,Spain |
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| Abstract: | Extraction of chia seed oil was performed with supercritical carbon dioxide (SC-CO2). 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-CO2 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 CO2 at 60 °C–250 bar to 28.8 g oil/kg CO2 at 60 °C–450 bar. The final extract obtained by SC-CO2 under different conditions and Soxhlet extraction contained mainly α-linolenic (64.9–65.6%) and linoleic (19.8–20.3%) acids.
SC-CO2 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. |
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