Journal of Tianjin Agricultural University ›› 2017, Vol. 24 ›› Issue (2): 63-66.

• Researches and Scientific Notes • Previous Articles     Next Articles

Optimization of Ultrasonic-assisted Extraction Technology and Antioxidant Activities of Flavonoids in Radish Leaves

WU Hai-qing1,2, ZHEN Run-ying1,2,Corresponding Author, HE Xin-yi1,2, SUN Gui-bao1,2   

  1. 1. College of Food Science and Biotechnology, Tianjin Agricultural University, Tianjin 300384, China;
    2. Tianjin Engineering and Technology Research Center of Agricultural Products Processing, Tianjin 300384, China
  • Received:2016-07-10 Online:2017-06-30 Published:2019-10-15

Abstract: Total flavonoids were extracted from radish leaves using ethanol as extraction solvent with the aid of ultrasonic treatment. Five single-factor experiments with four factors triple orthogonal design was adopted to research the ultrasonic-assisted ethanol extraction process of flavonoids in the water bath. The scavenging abilities against hydroxyl radicals (·OH) and (O2) in vitro of flavonoids were determined. The results indicated that the optimum extraction parameters were as follows:the volum fraction of ethanol was 60%, solid-liquid ratio was 15(m:V), ultrasonic treatment 15min, immerse 30 min under the temperature of 50 ℃. Under these conditions, the extraction rate of total flavonoids is up to 1.41%, was the traditional extraction method of 200%. Flavonoids of radish leaves can effectively scavenge·OH and O2, and the role of these effect increased with the increase of flavonoids concentration, IC50 were 0.643 8, 1.523 1 mg/mL. These results demonstrated that UAE was a highly effective way to extract flavonoids from radish leaves and the antioxidant activity of flavonoids was high.

Key words: radish leaves, flavonoids, ultrasonic wave, assisted, antioxidant

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