食品科学

• 基础研究 • 上一篇    下一篇

流动注射化学发光法测定飞龙掌血多糖清除羟自由基的能力

田春莲1,康炼常2,王 鹏1,龚竹琼3   

  1. 1.吉首大学 林产化工工程湖南省重点实验室,湖南 张家界 427000;2.华侨大学化工学院,福建 厦门 361021;
    3.张家界市产商品质量监督检验所,湖南 张家界 427000
  • 出版日期:2013-07-15 发布日期:2013-06-28
  • 通讯作者: 田春莲
  • 基金资助:

    湖南省高校科技创新团队支持计划资助项目(湘教通(2010) 212号);湖南省科技计划资助项目(2010TP4007-1)

Determination of Hydroxyl Radical Scavenging Capacity of Polysaccharides from Roots of Toddalia asiatica by Flow Injection Chemiluminescence Method

TIAN Chun-lian1,KANG Lian-chang2,WANG Peng1,GONG Zhu-qiong3   

  1. 1. Key Laboratory of Hunan Forest Products and Chemical Industry Engineering, Jishou University, Zhangjiajie 427000, China;
    2. College of Chemical Technology, Huaqiao University, Xiamen 361021, China;3. Zhangjiajie Institute of Product Quality
    Supervision and Inspection, Zhangjiajie 427000, China
  • Online:2013-07-15 Published:2013-06-28
  • Contact: TIAN Chun-lian

摘要:

研究飞龙掌血多糖对羟自由基(·OH)的清除作用,以评价其抗氧化活性。以VC、茶多酚(TP)为阳性对照, 采用流动注射化学发光法通过测定飞龙掌血多糖与鲁米诺-H2O2体系反应后的发光强度来评价飞龙掌血多糖对·OH 的清除能力;考察不同质量浓度、时间、光照及加热处理等因素对·OH清除率的影响程度。结果表明:TP作为一种 强抗氧化剂清除·OH的能力明显强于飞龙掌血多糖和VC。在0.1~500μg/mL质量浓度范围内,飞龙掌血多糖对·OH 的清除能力与其质量浓度呈正相关,在质量浓度为500μg/mL时,对·OH清除率高达94%;强光照射116h后,VC 对·OH的清除率明显下降,飞龙掌血多糖稳定性较好。因此,飞龙掌血是一种良好的天然抗氧化剂来源。

关键词: 飞龙掌血多糖, 流动注射化学发光法, ·, OH, 清除率

Abstract:

The hydroxyl radical scavenging activity of polysaccharides from Toddalia asiatica roots was investigated by flow
injection chemiluminescence method and the effects of polysaccharide concentration, time, light and heat treatment on this
antioxidant activity were studied. Vitamin C and tea polyphenol (TP) were used as positive controls. The results showed that
the hydroxyl radical scavenging activity of TP as a potent antioxidant was significantly higher than that of Toddalia asiatica
polysaccharides and VC. The hydroxyl radical scavenging activity of of Toddalia asiatica polysaccharides showed a positive
concentration dependence over the range of 0.1 to 500 μg/mL and the scavenging rate at 500 μg/mL was as high as 94%. The
scavenging activity of VC was reduced substantially when exposed to strong light while Toddalia asiatica polysaccharides had
good light stability. Our results indicate that Toddalia asiatica is a promising natural source of antioxidants.

Key words: Toddalia asiatica polysaccharides, flow injection chemiluminescence method, hydroxy radical, scavenging rate

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