Abstract: Natural antioxidant enriched rice bran oil extracts were obtained by extracting rice bran oil with ethanol, isopropanol and ethyl acetate. The yields of extraction were 26.8%, 67.1% and 82.8% respectively. The extracts were added into conjugated linoleic acid(CLA) for oxidation test at 60℃. Results show that although different extracts have different antioxidative activity for CLA, they all have higher activity than BHT has. And among them the isopropanol extract has the highest activity. It is clear that the isopropanol extract can be used as a good natural antioxidant to protect CLA from oxidation.

Key words: rice bran oil, extraction, conjugated linoleic acid, antioxidant