FOOD SCIENCE ›› 2009, Vol. 30 ›› Issue (18 ): 206-208.doi: 10.7506/spkx1002-6300-200918043

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Extraction and Antioxidant Activities of Total Flavonoids from Corn Silk

FANG Min,ZHAN Cai-gui,GONG Zhi-yong*   

  1. College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
  • Received:2009-06-20 Online:2009-09-15 Published:2010-12-29
  • Contact: GONG Zhi-yong E-mail:zhiyong_gong@yahoo.com.cn

Abstract:

Total flavonoids in corn silk were extracted with ethanol and analyzed for their DPPH scavenging activity and total antioxidant capacity. The effects of ethanol concentration, extraction time, material/liquid ratio and extraction temperature were evaluated for optimizing the extraction procedure of total flavonoids. A maximum yield of total flavonoids of 1.67% was obtained by the 2 h extraction using 40% ethanol at 80 ℃. The total flavonoids from corn silk had marked antioxidant activities: the scavenging rate against DPPH free radicals was as high as 77.18% and the FRAP value reached 691.04 μmol/L.

Key words: corn silk, total flavonoids, extraction, antioxidant activities

CLC Number: