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Optimization of Extraction Conditions of Polyphenolic Compounds from Apple Pomace by Response Surface Methodology  

Kim, Yoon-Sook (Korea Food Research Institute)
Kim, Ro-Sa (Korea Food Research Institute)
Moon, Ji-Hye (Korea Food Research Institute)
Ji, Joong-Ryong (Paek Kwang C&S Co)
Choi, Hee-Don (Korea Food Research Institute)
Park, Yong-Kon (Korea Food Research Institute)
Publication Information
Korean Journal of Food Science and Technology / v.41, no.3, 2009 , pp. 245-250 More about this Journal
Abstract
This study examined the optimization of alcohol extraction conditions for maximizing the total polyphenols derived from apple pomace, by response surface methodology (RSM). The effects of four independent variables, including $X_1$ (ratio of solvent to sample content), $X_2$ (dipping time), $X_3$ (extraction time), and $X_4$(extraction temperature), were investigated at five levels using central composite design (CCD). $Y_1$ (yield) and $Y_2$ (total polyphenols) were chosen as dependent variables. The coefficients of determination, $R^2$, were greater than 0.900 (0.9042 and 0.9555). The results showed that the model fit was very significant (p<0.001). The optimum extraction conditions were as follows: 13.00 mL/g for the ratio of solvent to sample content, 89.02 min for dipping time, 180 min for extraction time, and $70^{\circ}C$ for extraction temperature. At these conditions, the predicted total polyphenol content was 29.68 mg catechin equiv./g.
Keywords
apple pomace; total polyphenols; response surface methodology;
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Times Cited By KSCI : 8  (Citation Analysis)
Times Cited By SCOPUS : 1
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