Phytosterols Are Minor Components of All Vegetable
نویسنده
چکیده
Supercritical carbon dioxide (SC-CO,). fractionation technique was evaluated as an altemativeprocess for reducing the free-fatty-acid (FFA) content and minimizing the phytosterolloss of rice bran oil (REO) during the process. The effects of pressure (20.5 to 32.0 MPa) and temperature (45 to 80 DC) for isothermal operation of the column on the composition of the resultant fractions were exarnined.Low"pressureand high-temperature conditions were found to befavorablefor minimizing triglycerides (TG) and phytosterol losses duringtheFFA removal from crude RBO. Rice bran oil fractions with < 1% FFA, about 95% TG, and 0.35% free sterol with 1.8%. oryzanol content could be obtained utilizing the described SC-C0 2 fractionation technique.
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