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Optimization of ultrasound-assisted extraction of oat bran oil and its antioxidant activity
  
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KeyWord:oat bran oil  ultrasound-assisted extraction  antioxidation
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SUN Xueru，LIU Jing，WANG Zhaorun，etc  
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Abstract:
      The ultrasound-assisted extraction of oat bran oil and its antioxidant activity were studied. The results showed that the optimal ultrasound-assisted extraction conditions of oat bran oil were obtained by response surface methodology based on single factor experiment as follows: ultrasonic power 400 W, ultrasonic temperature 57?℃, extraction time 49 min, volume ratio of n-hexane to anhydrous ethanol 72∶?28. Under the optimal conditions, the extraction rate of oat bran oil was 96.25%. The scavenging ability of oat bran oil on ·OH, O-2· and DPPH· increased with the increase of mass concentration of oat bran oil. When the mass concentration of oat bran oil was 5.0 mg/mL, the scavenging rates on ·OH, O-2· and DPPH· were 46.03%, 47.28% and 54.87%, respectively, which indicated that the oat bran oil had strong antioxidant activity in vitro.
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