What are the extraction methods of vitamin E
Apr 17, 2024
1. Saponification method: This is a traditional extraction method that involves mixing oil with an alkaline solution (such as potassium hydroxide solution) to perform a saponification reaction, and then extracting vitamin E through an organic solvent (such as ether or absolute ethanol). This method is widely used and is one of the EU standards and existing extraction methods in China.
2. Solvent extraction method: directly use organic solvents (such as n-hexane, isooctane or methanol) to extract vitamin E from raw materials. The choice of solvent depends on the characteristics of the raw material and the form of vitamin E required to be extracted.
3. Urea inclusion method: Mix the oil with urea and anhydrous methanol, separate vitamin E from other ingredients through urea inclusion, and then obtain vitamin E concentrate through steps such as cooling and filtration.
4. Supercritical fluid extraction (SFE): Using supercritical CO2 as the extraction agent, the selective extraction of vitamin E is achieved by adjusting pressure and temperature. The vitamin E extracted by this method is of high quality, but the equipment requirements and cost are high.
5. Solid-phase extraction method: Use a solid-phase extraction column to selectively adsorb and elute vitamin E through different chemical bonding effects.
6. Pressurized liquid phase extraction method: By increasing the pressure, the boiling point of the solvent is lowered and the extraction efficiency is improved.
7. Enzyme-assisted supercritical fluid extraction (EASE): combines the catalytic effect of enzymes with the characteristics of supercritical fluids to extract high-quality bioactive compounds, such as vitamin E. This method does not change the structure of the target molecule.
8. Molecular distillation method: Separation is achieved through vacuum distillation by utilizing the difference in movement speed of molecules of different substances at high temperatures.
9. Adsorption method: Use adsorption resin and other materials to adsorb vitamin E, and then elute it through an appropriate solvent.
10. Column chromatography: Separate and purify vitamin E through a chromatography column filled with silica gel or other adsorbent materials, and using different eluents to pass through the chromatography column.
