According to CODEX standards for edible fat and oil (CODEX
STAN 210, 1999), the maximum level of AV and PV of cold pressed
oil are 4.0 mg KOH/g oil and 15 milliequivalents of active oxygen/kg
oil, respectively. According to Tao, Rao, and Liuzzo (1993), rice bran
oil with over 5% FFA is considered unsuitable for human consumption.
Our results show that stabilized RBO by microwave and hot air
heating had AV 6.30e6.98 mg KOH/g oil, FFA 3.17e3.51% and PV
11.72e12.13 milliequivalents of active oxygen/kg oil. The stabilized
rice bran with hot air and microwave had PV lower than that of
CODEX standards and had FFA 5% lower but they had a little higher
AV than that of CODEX standards. Therefore, the stabilized rice bran
by hot air and microwave heating could be applied to produce the
cold pressed RBO for human consumption. But it may need to find
some process to reduce AV to reach the CODEX standard.