Extraction of natural vitamin E from wheat germ by supercritical carbon dioxide |
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| Authors: | Ge Yiqiang Yan Hong Hui Bodi Ni Yuanying Wang Shaoxiao Cai Tongyi |
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| Institution: | College of Food Science, China Agricultural University (CAU), 2 Yuanmingyuan Road-West, Beijing 100094, People's Republic of China. yiqiangge@hotmail.com |
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| Abstract: | An efficient supercritical fluid extraction (SFE) process with carbon dioxide (SFE-CO(2)) was developed for the extraction of natural vitamin E (V(E)) from wheat germ. Both the pretreatment of extracted wheat germ and extraction conditions were optimized to ensure maximal V(E) yield. The extraction was undertaken at the extracting pressure of 4000-5000 psi, the extracting temperature of 40-45 degrees 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 V(E) and its isomers extracted by supercritical CO(2) with those by conventional solvent extraction suggested that this SFE process was a practical process prospectively superior to conventional solvent extraction to prepare V(E) from wheat germ. |
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