荞麦提取物抗氧化活性研究

摘要

[目的]研究荞麦不同部位提取物抗氧化活性差异,更好地开发荞麦的保健功能.[方法]分别考察荞麦皮、荞麦粉和荞麦粒乙醇提取物对DPPH自由基和ABTS自由基的清除作用,以及其黄酮类化合物的得率.[结果]三者乙醇提取物中黄酮类化合物得率最高的为荞麦皮,最小的为荞麦粉,荞麦粒介于两者之间;三者提取物对DPPH自由基和ABTS自由基均具有很好的清除效果,且对DPPH自由基和ABTS自由基清除率达50%的样品浓度比较,荞麦皮浓度最低,荞麦粉最高,荞麦粒浓度介于两者之间.[结论]荞麦中黄酮类化合物是荞麦提取物具有抗氧化活性作用的重要成分.%[Objective]To study the difference of antioxidant activity of extracts from different parts of buckwheat, so as to better develop the health function of buckwheat.[Method]The scavenging effects of buckwheat husk, buckwheat flour and buckwheat grain ethanol extracts on DPPH radical and ABTS radical scavenging activity, and the yield of flavonoids were investigated.[ Result] For the extraction yield of fla-vonoids compounds, the highest was buckwheat husk, and the lowest was buckwheat flour, buckwheat grain was in the middle.Their ethanol extracts all could scavenge DPPH and ABTS radical,and to compare DPPH and ABTS radicals scavenging concentration rate of 50% of the samples, the content of buckwheat husk was the lowest, the content of buckwheat flour was highest, and the content of buckwheat grain was in the middle.[Conclusion]The flavonoids compounds play an important role in antioxidant activity of buckwheat ethanol extracts.