TY - JFULL AU - Boy Arief Fachri PY - 2016/6/ TI - Using Phase Equilibrium Theory to Calculate Solubility of γ-Oryzanol in Supercritical CO2 T2 - International Journal of Chemical and Molecular Engineering SP - 566 EP - 570 VL - 10 SN - 1307-6892 UR - https://publications.waset.org/pdf/10004367 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 113, 2016 N2 - Even its content is rich in antioxidants ϒ-oryzanol, rice bran is not used properly as functional food. This research aims to (1) extract ϒ-oryzanol; (2) determine the solubility of ϒ-oryzanol in supercritical CO2 based on phase equilibrium theory; and (3) study the effect of process variables on solubility. Extraction experiments were carried out for rice bran (5 g) at various extraction pressures, temperatures and reaction times. The flowrate of supercritical fluid through the extraction vessel was 25 g/min. The extracts were collected and analysed with high-pressure liquid chromatography (HPLC). The conclusion based on the experiments are as: (1) The highest experimental solubility was 0.303 mcg/mL RBO at T= 60°C, P= 90 atm, t= 30 min; (2) Solubility of ϒ-oryzanol was influenced by pressure and temperature. As the pressure and temperature increase, the solubility increases; (3) The solubility data of supercritical extraction can be successfully determined using phase equilibrium theory. Meanwhile, tocopherol was found and slightly investigated in this work. ER -