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Free Radical Scavenging Effect and Extraction Condition of Ethanol Extracts of Epimedium Koreanum Nakai Containing Different Icariin Quantity  

Kim, Seo-Jin (Department of Food Science and Biotechnology, College of Bioscience and Biotechnology, Kangwon National University)
Oh, Deog-Hwan (Department of Food Science and Biotechnology, College of Bioscience and Biotechnology, Kangwon National University)
Publication Information
Journal of Food Hygiene and Safety / v.22, no.4, 2007 , pp. 359-364 More about this Journal
Abstract
This study was conducted to determine the optimum condition of extraction and antioxidant activity of ethanol extracts of Epimedium koreanum Nakai based on the icariin quantity. Also, further organic solvent fractions of hexane, chloroform, ethyl acetate and butanol were obtained from the ethanol extract of Epimedium koreanum Nakai at different temperatures. Total ethanol extraction yield of wild grape seed ranged from 11.8% to 39.3% depending on the concentration of icariin as well as different ethanol concentration, extraction temperature and time condition. Among different extraction temperatures and time, the highest extraction yield of 39.3% was obtained at 70% ethanol for 3 hour at $50^{\circ}C$ in the sample containing the 0.596% icariin (KE9412). In the meantime, the strongest free radical scavenging effect $(RC_{50})$ with $18.9{\mu}g/mL$ in the KE9412 sample was observed in 70% ethanol extract of Epimedium koreanum Nakai extracted for 7 hour at $70^{\circ}C$, while $RC_{50}$ with $35.2{\mu}g/mL$ was observed in the KE9405 (0.20% icariin content) sample at same condition. Also, antioxidant activity of ethanol extracts of Epimedium koreanum Nakai increased as icariin concentration increased. Among each fraction obtained from organic solvents, butanol fraction was found to have the strongest $RC_{50}\;(39.2{\mu}g/mL)$ and followed by ethylacetate $(49.0{\mu}g/mL)$, water $(118.8{\mu}g/mL)$, ethylacetate $(119.8{\mu}g/mL)$, and chloroform fraction $(138.5{\mu}g/mL)$ respectively.
Keywords
Epimedium koreanum Nakai; free radical scavenging; icariin;
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Times Cited By KSCI : 11  (Citation Analysis)
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