In vitro antioxidant activity of feruloyl arabinose isolated from maize bran by acid hydrolysis.

In this study feruloylated oligosaccharides (FOs) was released from maize bran by hydrochloric acid hydrolysis, and feruloyl arabinose (F-Ara) was obtained by D301 macroporous resin chromatography followed by polyamide resin purification from FOs. After structural identification, the antioxidant activity of F-Ara was evaluated in vitro by DPPH and superoxide radical scavenging activity assay, reducing power assay and chelating activity assay. The results show that F-Ara exhibited antioxidant activity in vitro when compared to standard antioxidants such as butylated hydroxyanisole, ferulic acid and L-ascorbic acid. The antioxidant activity depends on the concentration and increases with increasing dose of sample. The present study suggests that F-Ara possesses promising future for its strong reducing power, chelating activity and free radical-scavenging activity. Therefore, it can be a natural and efficient antioxidant used in food, medicine and cosmetic.