| 玉米须总黄酮的提取与抗氧化活性研究 |
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| 引用本文： | 方 敏,占才贵,宫智勇.玉米须总黄酮的提取与抗氧化活性研究[J].食品科学,2009,30(18):206-208. |
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| 作者姓名： | 方 敏 占才贵 宫智勇 |
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| 作者单位： | 武汉工业学院食品科学与工程学院 |
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| 摘 要： | 以乙醇体积分数、浸提时间、固液比、提取温度为考察因素对玉米须总黄酮的提取条件进行正交设计试验，并用DPPH 和FRAP 两种方法测定了总黄酮的抗氧化活性。结果表明：玉米须总黄酮提取的最佳工艺条件为乙醇体积分数40%、提取时间2h、固液比1:25(m/V)、提取温度80℃，此时玉米须总黄酮的提取率为1.67%；玉米须总黄酮的抗氧化作用明显，对DPPH 自由基的清除率达到77.18%，总抗氧化能力FRAP 值为691.04μmol/L。
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| 关 键 词： | 玉米须 总黄酮 提取 抗氧化 |
| 收稿时间： | 2009-06-20 |
Extraction and Antioxidant Activities of Total Flavonoids from Corn Silk |
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| FANG Min,ZHAN Cai-gui,GONG Zhi-yong.Extraction and Antioxidant Activities of Total Flavonoids from Corn Silk[J].Food Science,2009,30(18):206-208. |
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| Authors: | FANG Min ZHAN Cai-gui GONG Zhi-yong |
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| Affiliation: | College of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China |
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| Abstract: | Total flavonoids in corn silk were extracted with ethanol and analyzed for their DPPH scavenging activity and total antioxidant capacity. The effects of ethanol concentration, extraction time, material/liquid ratio and extraction temperature were evaluated for optimizing the extraction procedure of total flavonoids. A maximum yield of total flavonoids of 1.67% was obtained by the 2 h extraction using 40% ethanol at 80 ℃. The total flavonoids from corn silk had marked antioxidant activities: the scavenging rate against DPPH free radicals was as high as 77.18% and the FRAP value reached 691.04 μmol/L. |
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| Keywords: | corn silk total flavonoids extraction antioxidant activities |
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