NDLI: Time Fractionation of Minor Lipids from Cold-Pressed Rapeseed Cake Using Supercritical CO$

Content Provider	Springer Nature Link
Author	Uquiche, Edgar Fica, Ximena Salazar, Katherine del Valle, José M.
Copyright Year	2012
Abstract	This work explored the possibility of using supercritical carbon dioxide (SC-CO$_{2}$) to achieve fractionation of pre-pressed rapeseed (Brassica napus) cake oil at 30–50 MPa, at 40 or 80 °C, and increase the concentration of minor lipids (sterols, tocopherols, carotenoids) in the oil. Minor lipids are partially responsible for desirable antioxidant effects that protect against degradation and impart functional value to the oil. The weight and concentration of minor lipids in oil fractions collected during the first 60 min were analyzed. Cumulative oil yield increased with pressure, and with temperature at ≥40 MPa, but was lower at 80 °C than at 40 °C when working at pressure ≤35 MPa. Differences in solubility between the oil and minor lipids explained fractionation effects that were small for tocopherols. Unlike tocopherols, which are more soluble in SC-CO$_{2}$ than the oil, sterols and carotenoids are less soluble than the oil, and their concentration increased in the later stages of extraction, particularly at ≥40 MPa, when there was not enough oil to saturate the CO$_{2}$ phase. Because of the fractionating effects on rapeseed oil composition, there was an increase in the antioxidant activity of the oil in the second half as compared to the first half of the extraction. Consequently, this study suggests that SC-CO$_{2}$ extraction could be used to isolate vegetable oil fractions with increased functional value.
Starting Page	1135
Ending Page	1144
Page Count	10
File Format	PDF
ISSN	0003021X
Journal	Journal of the American Oil Chemists' Society
Volume Number	89
Issue Number	6
e-ISSN	15589331
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-01-13
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pre-pressed cake Minor lipids Oil fractionation Rapeseed Supercritical CO$_{2}$ Food Science Biomaterials Agriculture Biotechnology Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Chemical Engineering

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