Study on antioxidant stability of flavonoids from Scutellaria baicalensis Georgi
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摘要: 以从黄芩中提取得到的黄酮为研究对象,采用清除DPPH自由基法测定样品的抗氧化活性,研究不同外界因素（酸碱度、温度、光照条件及金属离子）对其抗氧化稳定性的影响。结果表明,黄芩黄酮清除DPPH自由基的能力随着pH的升高和光照时间的延长而降低,而温度和金属离子（Na+、K+、Ca2+）对其清除率的影响并不大。本文初步分析了黄芩黄酮的抗氧化稳定性,为其作为天然抗氧剂的开发利用提供了基础数据。Abstract: The antioxidant stability of flavonoids from Scutellaria baicalensis Georgi was assessed by its capacity to scavenge the DPPH free radical under different treatments ( such as pH, temperature, illumination, and metal ions) . Results indicated that the scavenging capacity of flavonoids from S. baicalensis against DPPH free radical decreased with the increase of pH or extension of illumination, while temperature or metal ions did not produce a great reduction of scavenging capacity.The paper preliminarily analyzed the antioxidant stability of flavonoids from S.baicalensis to provide the underlying data for future development as natural antioxidants.
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Keywords:
- Scutellaria baicalensis Georgi /
- flavonoids /
- antioxidant /
- stability /
- DPPH free radical
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