FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (19): 45-48.doi: 10.7506/spkx1002-6630-201019007

• Basic Research • Previous Articles     Next Articles

Antioxidant Activity Assessment of Extracts from Different Parts of Sonchus oleraceus L.

HAN Yang-yang1，WANG Tian-xiao2，ZHU Hai-fang1，WANG Wei1，WANG Jian-hua1,*   

  1. 1. College of Life Science, Shandong Agricultural University, Tai an 271017, China；
    2. College of Materials, Xiamen University, Xiamen 361005, China
  • Received:2009-12-22 Online:2010-10-15 Published:2010-12-29
  • Contact: WANG Jian-hua1,* E-mail:jhwangjh@163.com

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Abstract:

Four different parts of Sonchus oleraceus L. (root, stem, leaf and flower) were extracted separately with water and different concentrations of ethanol (25%, 50%, 75% and 100%) under room temperature. The calculation of extraction efficiency was performed, and the resultant extracts were tested for their DPPH radical scavenging capacity (EC50, half maximal effective concentration) and the contents of total flavonoids. Fifty percent ethanol gave the highest extraction efficiency of ethanol soluble substances from each of these four parts of Sonchus oleraceus L. Different extracts from different parts of Sonchus oleraceus L. all had significantly dosage-dependent antioxidant activity, which was related to the contents of total flavonoids and total polyphenols. The order of antioxidant activity for these four parts was: flower > leaf > stem > root.

Key words: Sonchus oleraceus L., total flavonoids, total polyphenols, antioxidant activity

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