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响应面法优化繁缕中总黄酮提取工艺及体外抗氧化作用研究

Hai-tao XIA,Yu-fen LIU, Shi-ying LI

Hubei Agricultural Sciences(2014)

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Abstract
用响应面法优化繁缕[Stellaria media(L.) Cyr.]中总黄酮类化合物的提取工艺,通过羟自由基、超氧阴离子自由基、总还原力试验测定繁缕中总黄酮的体外抗氧化作用,并与抗坏血酸和叔丁基对苯二酚的抗氧化能力进行比较。结果表明,提取工艺最佳条件为提取温度86℃、提取时间2.5 h、液料比V 乙醇:m 繁缕粉为31.5:1(mL:g)、提取2次,该条件下总黄酮提取率预测值为3.907%,验证值为3.879%。繁缕中总黄酮的还原能力、对超氧阴离子自由基和羟自由基的清除能力均表现出较好的效果,清除超氧阴离子自由基和羟自由基的IC50分别为0.583 mg/mL和0.626 mg/mL,其抗氧化能力高于维生素C和叔丁基对苯二酚。
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Key words
flavonoids,antioxidant activity,extraction process
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