Abstract
An efficient process was developed for enrichment of tocols from rice germ oil (RGO) using supercritical carbon dioxide (SC-CO 2). Tocols were efficiently enriched in residue by removal of fatty acid methyl ester from the esterified RGO using SC-CO 2. The enrichment of tocols was carried out at an operating pressure of 12.4-15.8MPa, an operating temperature of 40-60°C and a carbon dioxide flow rate of 5.0Lmin -1. The combination of 13.8MPa pressure and 60°C temperature was selected as the most suitable for efficient enrichment of tocols. The level of tocols (1270mg/100g) in the residue obtained at these operating conditions was six times higher than the tocols level (192mg/100g) of the starting material, namely esterified RGO. There were no significant differences in relative percentages of tocols homologues between esterified RGO and the residue obtained by SC-CO 2 extraction.
| Original language | English |
|---|---|
| Pages (from-to) | 761-767 |
| Number of pages | 7 |
| Journal | International Journal of Food Science and Technology |
| Volume | 47 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2012 |
Keywords
- Enrichment
- Rice germ oil
- Supercritical carbon dioxide
- Tocols
- Tocopherol
- Tocotrienol
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