食品科学

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银合欢果皮总黄酮含量测定及抗氧化活性

杨静毅1,喻玲玲1,2,*,吴 梅1,刘纪成1,张雨杰1,江 凯1,王 毕1   

  1. 1.三峡大学医学院,湖北 宜昌 443002;2.三峡大学 天然产物研究与利用湖北省重点实验室,湖北 宜昌 443002
  • 出版日期:2015-04-25 发布日期:2015-04-28
  • 通讯作者: 喻玲玲
  • 基金资助:

    湖北省教育厅优秀青年项目(Q20131309);三峡大学人才启动基金项目(KJ2011B050)

Antioxidant Activities and Total Flavonoid Content in the Peel of Leucaena leucocephala Fruits

YANG Jingyi1, YU Lingling1,2,*, WU Mei1, LIU Jicheng1, ZHANG Yujie1, JIANG Kai1, WANG Bi1   

  1. 1. College of Medical Science, China Three Gorges University, Yichang 443002, China;
    2. Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang 443002, China
  • Online:2015-04-25 Published:2015-04-28
  • Contact: YU Lingling

摘要:

目的:建立测定银合欢果皮中总黄酮含量的方法,研究其体外抗氧化活性。方法:运用NaNO2-Al(NO3)3显色法,检测总黄酮含量,并采用1,1-二苯基-2-三硝基苯肼(1,1-diphenyl-2-picrylhydrazyl,DPPH)法和还原力分析其抗氧化活性。结果:芦丁在0.01~0.05 mg/mL(r=0.999 1)质量浓度范围内,吸光度与质量浓度之间呈良好线性关系,平均回收率为99.35%(相对标准偏差为1.37%),总黄酮含量为1.76 mg/g;银合欢果皮具有显著的抗氧化活性,且呈剂量依赖性,其抑制DPPH自由基的半数抑制浓度(IC50)为0.32 mg/mL,还原力IC50为70.12 μg/mL。结论:所建立的方法简单快捷、准确、灵敏、重复性好,适合银合欢果皮中总黄酮含量的测定。银合欢果皮中含有丰富的黄酮类化合物,且具有良好的体外抗氧化活性。

关键词: 银合欢果皮, 黄酮, 抗氧化活性

Abstract:

Purpose: To establish a method for the determination of total flavonoids and to evaluate the antioxidant activity
of the ethanol extract of Leucaena leucocephala (Lam.) de Wait fruit peel. Methods: The content of total flavonoids was
measured by NaNO2-Al(NO3)3 assay. The antioxidant property was determined by 1,1-diphenyl-2-picrylhydrazyl (DPPH)
free radical scavenging and reducing power assays. Results: The linear range of rutin was 0.01–0.05 mg/mL (r = 0.999 1).
The average recovery rate was 99.35% with relative standard deviation (RSD) of 1.37%. The content of total flavonoids was
1.76 mg/g. In DPPH radical scavenging assay, the sample exhibited antioxidant activity in a dose-dependent manner with
IC50 of 0.32 mg/mL. The IC50 for reducing power was 70.12 μg/mL. Conclusions: The developed method is rapid, accurate,
simple, reproducible and suitable for determination of total flavonoids in the fruit peel of L. leucocephala. Moreover, the
fruit peel of L. leucocephala is rich in flavonoids and possesses high antioxidant activity.

Key words: Leucaena leucocephala (Lam.) de Wait peel, flavonoids, antioxidant activity

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