Extraction of Natural Vitamin E from Wheat Germ by Supercritical Carbon Dioxide

An efficient supercritical fluid extraction (SFE) process with carbon dioxide (SFE-CO2) was developed for the extraction of natural vitamin E (VE) from wheat germ. Both the pretreatment of extracted wheat germ and extraction conditions were optimized to ensure maximal VE yield. The extraction was un...

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Bibliographic Details
Published in:Journal of agricultural and food chemistry 2002-02, Vol.50 (4), p.685-689
Main Authors: Ge, Yiqiang, Yan, Hong, Hui, Bodi, Ni, Yuanying, Wang, Shaoxiao, Cai, Tongyi
Format: Article
Language:English
Subjects:
Biological and medical sciences
Carbon Dioxide
Cereal and baking product industries
Chromatography, Supercritical Fluid - methods
Food industries
Fundamental and applied biological sciences. Psychology
Particle Size
Solvents
Triticum - chemistry
Vitamin E - isolation & purification
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Summary:An efficient supercritical fluid extraction (SFE) process with carbon dioxide (SFE-CO2) was developed for the extraction of natural vitamin E (VE) from wheat germ. Both the pretreatment of extracted wheat germ and extraction conditions were optimized to ensure maximal VE yield. The extraction was undertaken at the extracting pressure of 4000−5000 psi, the extracting temperature of 40−45 °C, and the carbon dioxide flow rate of 2.0 mL/min for 90 min. An optimized pretreatment of wheat germ was usually necessary with a particle size of 30 mesh and a moisture content of 5.1%. A yield comparison of VE and its isomers extracted by supercritical CO2 with those by conventional solvent extraction suggested that this SFE process was a practical process prospectively superior to conventional solvent extraction to prepare VE from wheat germ. Keywords: Supercritical fluid extraction; vitamin E; wheat germ
ISSN:0021-8561
1520-5118
DOI:10.1021/jf010615v