| 枇杷花提取物抗氧化活性研究 |
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| 引用本文： | 闫永芳,孙钧,孟天真,叶兴乾.枇杷花提取物抗氧化活性研究[J].食品工业科技,2012(1):122-124. |
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| 作者姓名： | 闫永芳 孙钧 孟天真 叶兴乾 |
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| 作者单位： | 1. 浙江大学生物系统工程与食品科学学院,浙江杭州,310029
2. 浙江省农业厅经济作物管理局,浙江杭州,310020 |
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| 基金项目： | 教育部创新工程重大项目培育资金项目(707034);浙江省重大科技专项重点项目(2008C02005-2);中央高校基本科研业务费专项资金资助 |
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| 摘 要： | 采用DPPH、ABTS、FRAP和福林酚(F-C)四种方法测定枇杷花酚类化合物的抗氧化活性,比较最优条件下蒸馏水、甲醇、乙醇三种溶剂的提取效率。结果表明,DPPH、ABTS、F-C法所测抗氧化活性顺序一致,即为水提物>甲醇提取物>乙醇提取物,但当量大小有所差异,其中F-C实验结果最大;FRAP实验中,甲醇提取物抗氧化活性略大于水提物,乙醇提取物活性最低。其原因可能是由于提取溶剂极性不同,反应机理不同,FRAP法基于单电子转移原理。因此,枇杷花酚类物质在乙醇中的溶解性较差。
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| 关 键 词： | 枇杷花 DPPH ABTS F-C FRAP 抗氧化 |
Antioxidant capacities of loquat flower extracts using different solvents |
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| YAN Yong-fang,SUN Jun,MENG Tian-zhen,YE Xing-qian.Antioxidant capacities of loquat flower extracts using different solvents[J].Science and Technology of Food Industry,2012(1):122-124. |
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| Authors: | YAN Yong-fang SUN Jun MENG Tian-zhen YE Xing-qian |
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| Affiliation: | 1 (1.College of Biosystem Engineering and Food Science,Zhejiang University,Hangzhou 310029,China;2.Industrial Crop Bureau,Agriculture Department of Zhejiang Province,Hangzhou 310020,China) |
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| Abstract: | DPPH,ABTS,FRAP and F-C methods were used to analyze the antioxidant capacity of loquat flowers extracts.The results showed that water extracts exhibited the highest antioxidant capacity,followed by methanol extracts and ethanol extracts in the three methods(DPPH,ABTS,F-C).In the FRAP method the methanol extracts showed higher antioxidant capacity than the water extracts.That may be due to different extract solvents and different reaction mechanisms.In general,the ethanol extracts exhibited the lowest antioxidant capacity. |
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| Keywords: | loquat flower DPPH ABTS F-C FRAP antioxidant capacity |
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