TY - JOUR AB - The research on purification of used cooking oil as biodiesel feedstock has been done. Refining was performed using methanol with varied concentrations and volumes. A total of 10 grams of used cooking oil was extracted using methanol with a variation concentration of 100%, 70%, 50% and 30%, and a variation of volume 10, 25, 50, 100, and 150 mL. After extraction, the free fatty acids contents of the extracted oil were analyzed. The results showed that pure methanol has the highest ability to reduce the content of free fatty acid with a percentage of reduction for 89.23%. The optimum ratio of used cooking oil and methanol is about 1:15 (v/v). AD - Univ Islam Indonesia, Fac Math & Nat Sci, Dept Chem, Jalan Kaliurang Km 14-5 Sleman, Special Dist Jogjakarta, Indonesia AN - WOS:000404123700130 AU - Julianto, T. S. AU - Suratmi DO - Unsp 020130-1 J2 - Aip Conf Proc LA - English N1 - Bh9js PY - 2017 SN - 0094-243x ST - The Effect of Concentrations and Volumes of Methano in Reducing Free Fatty Acid Content of Used Cooking Oil as Biodiesel Feedstock T2 - International Conference on Chemistry, Chemical Process and Engineering (Ic3pe) 2017 TI - The Effect of Concentrations and Volumes of Methano in Reducing Free Fatty Acid Content of Used Cooking Oil as Biodiesel Feedstock UR - ://WOS:000404123700130 VL - 1823 ID - 13803 ER -