梅片树叶挥发油的抗氧化活性研究

目的:对梅片树叶挥发油的抗氧化活性进行了研究。方法:采用水蒸气蒸馏法提取得到挥发油,用紫外分光光度法测定挥发油对羟基(OH)自由基、1,1-二苯基-2-三硝基苯肼(DPPH)自由基的清除能力以及挥发油的还原能力,并与2,6-二叔丁基-4-甲基苯酚(BHT)比较。同时,对影响其抗氧化活性的物质进行分析。结果:挥发油对羟基自由基具有较好的清除能力,且清除效果要强于BHT;而挥发油对DPPH.的清除率和还原能力要明显弱于BHT,梅片树叶挥发油中高含量的总多酚和总黄酮可能是其抗氧化活性的主要物质来源。结论:挥发油在某些抗氧化活性方面有较好的抗氧化效果,具有作为天然抗氧化剂的巨大潜力。

Study on antioxidant activity of volatile oil from Mei Pian tree

The antioxidant activity of volatile oil from Mei Pian tree(Cinnamomun burmannii physilogical type) was studied.The volatile oil was extracted by the methods of steam distillation.The antioxidant activity of volatile oil was evaluated by the methods of spectrophotometry,and the antioxidant activities were compared with BHT.The results showed that the activity of scavenging ·OH radicals of volatile oil was stronger than BHT.The activity of scavenging DPPH· radicals and reduce power of volatile oil were weaker than BHT.And the antioxidant activity of volatile oil from Mei Pian tree mainly resulted from the high contents of total phenols and total flavonoids of volatile oil.Therefore,the volatile oil obtained from Mei Pian tree was proved to have strong antioxidant activity.