Extraction of oil from wheat germ by supercritical CO2.
Alessandra Piras, Antonella Rosa, Danilo Falconieri, Silvia Porcedda, Maria A Dessì, Bruno Marongiu
Index: Molecules 14(7) , 2573-81, (2009)
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Abstract
This study examined the supercritical fluid extraction of wheat germ oil. The effects of pressure (200-300 bar at 40 degrees C) and extraction time on the oil quality/quantity were studied. A comparison was also made between the relative qualities of material obtained by SFE and by organic solvent extraction. The extracts were analyzed for alpha-tocopherol and polyunsaturated fatty acid content. The maximum wheat germ oil yield at about 9% was obtained with supercritical carbon dioxide extraction at 300 bar, while fatty acid and alpha-tocopherol composition of the extracts was not remarkable affected by either pressure or the extraction method.
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