Three operating parameters were pressure, temperature and particle size of supercritical carbon dioxide extraction of oil from Swietenia mahagoni have been optimized by response surface methodology to obtain high yield of oil. Results showed that data were adequately fitted into the second-order polynomial model. The linear and quadratic terms of independent variables of temperature, pressure and particle size have significant effects on the oil yield. Optimum conditions for oil yield within

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... experimental range of the studied variables were 29.99 MPa, 55.29 o C and 0.75 mm, and the oil yield was predicted to be 20.76%. Abstrak Minyak Swietenia mahagoni telah diekstrak menggunakan kaedah superkritikal karbon dioksida di mana tiga parameter iaitu tekanan, suhu dan sais zarah telah dioptimumkan menggunakan teknik gerak balas permukaan untuk mendapat hasil minyak yang tinggi. Keputusan telah diperolehi dengan memasukkan data kedalam model polinomial tertib kedua. Terma linear dan kuadratik menunjukkan bahawa pemboleh ubah tekanan, suhu dan saiz zarah mempunyai peranan yang penting pada penghasilan minyak. Keadaan optimum dalam julat eksperimen ialah 29.99 MPa, 55.29℃, 0.75 mm dan hasil minyak yang diramal ialah 20.76%. Kata kunci: Benih Swietenia mahagoni; pengeluaran CO2 superkritikal; kaedah permukaan response