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山核桃壳中黄酮提取及其抗氧化活性测定

时间:2022-12-26 16:05:05 公文范文 来源:网友投稿

对照,研究洗脱物对ABTS、DPPH、羟自由基的清除能力和铁离子的还原能力。结果表明,粗提物黄酮的纯度为19.16%,30%洗脱物、50%洗脱物、70%洗脱物提取黄酮的纯度分别为56.90%、47.00%、18.47%;清除ABTS自由基能力大小依次为维生素C>BHT>30%洗脱物>50%洗脱物>70%洗脱物,清除DPPH自由基的能力大小依次为维生素C>30%洗脱物>50%洗脱物>70%洗脱物>BHT,清除羟自由基能力大小依次维生素C>30%洗脱物>50%洗脱物>70%洗脱物,还原铁离子能力大小依次为维生素C>BHT>30%洗脱物>50%洗脱物>70%洗脱物。这表明黄酮纯度越高,其抗氧化活性越强,山核桃壳乙醇梯度洗脱物的抗氧化活性与黄酮纯度呈正相关,其中,以30%洗脱物的抗氧化性最强,可用于后续功能作用或生物活性的深入研究。

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