Extraction of oil from wheat germ by supercritical CO2.
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.
Piras
Alessandra
A
Dipartimento di Scienze Chimiche, Università degli Studi di Cagliari, Cittadella Universitaria di Monserrato, SS 554, km 4.500 09042 Cagliari, Italy. apiras@unica.it
Rosa
Antonella
A
Falconieri
Danilo
D
Porcedda
Silvia
S
Dessì
Maria A
MA
Marongiu
Bruno
B
D002245:Carbon Dioxide / Q000737:chemistry*; D002725:Chloroform / Q000737:chemistry; D005227:Fatty Acids / Q000032:analysis; D006586:Hexanes / Q000737:chemistry; D000432:Methanol / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry; D010938:Plant Oils / Q000302:isolation & purification*; D011312:Pressure; D014908:Triticum / Q000737:chemistry*; D024502:alpha-Tocopherol / Q000032:analysis
D005227:Fatty Acids; D006586:Hexanes; D010936:Plant Extracts; D010938:Plant Oils; D002245:Carbon Dioxide; C050055:wheat germ oil; D002725:Chloroform; D024502:alpha-Tocopherol; D000432:Methanol