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http://dx.doi.org/10.11002/kjfp.2011.18.5.755

Optimization of Extraction Conditions for Ethanol Extracts from Citrus unshiu Peel by Response Surface Methodology  

Jeong, Ji-Eun (FoodWell Co.)
Shim, Sang-Phil (FoodWell Co.)
Jeong, Yoo-Seok (Biohealth convergence Center, Daegu Technopark)
Jung, Hee-Kyoung (Biohealth convergence Center, Daegu Technopark)
Kim, Young-Chan (Korea Food Research Institute)
Hong, Joo-Heon (Department of Food Science and Technology, Catholic University of Daegu)
Publication Information
Food Science and Preservation / v.18, no.5, 2011 , pp. 755-763 More about this Journal
Abstract
This study was conducted to monitor the quality characteristics Citrus unshiu ethanolic extracts by a response surface methodology. In extraction conditions based on the central composite design with variations in ethanol concentration (0~100%), extraction temperature($35\sim95^{\circ}C$), and ratio of solvent to sample(20 mL/g). The maximum value of yield was 36.31% at $93.18^{\circ}C$, 67.13% of ethanol concentration. The extraction yield and total polyphenol content were improved with the increase of ethanol concentration than extraction temperature. Total flavonoid content was improved with the increase of extraction temperature than ethanol concentration. The coefficients of determinations($R^2$) were 0.8646(p<0.1) and 0.9153(p<0.05) in electron donating ability and hesperidin content, respectively. Estimated conditions for the maximized extraction including yield, total polyphenol content, total flavonoid content, electron donating ability, and hesperidin content were 55~73% in ethanol concentration, $89\sim95^{\circ}C$ in extraction temperature, and 20 mL/g in ratio of solvent to sample.
Keywords
citrus unshiu peel; ethanol extract; optimization; RSM;
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Times Cited By KSCI : 12  (Citation Analysis)
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