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Optimization of antioxidant activity of extruded peanut powder by response surface methodology
  
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KeyWord:extruded peanut powder  antioxidant activity  response surface methodology
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ZHANG Liangchen  
WANG Bo  
SHI Taiyuan，etc  
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Abstract:
      In order to improve the antioxidant activity of extruded peanut powder, the species of most effective antioxidant for improving the antioxidant activity of extruded peanut powder were determined through single factor experiment, then using OXITEST oil oxidation reactor, the ratio of antioxidants was optimized by response surface methodology with antioxidation time as response value. The results showed that the combination of TBHQ and PG could enhance the antioxidant activity of extruded peanut powder significantly, and the antioxidation effect was stronger when citric acid was added; when the dosages of TBHQ, PG and citric acid were 0.013% (based on the oil content of the sample, the same below), 0.001% and 0.007% respectively, the antioxidant activity of extruded peanut powder was the best, and the antioxidation time reached 44.79 h.
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