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http://dx.doi.org/10.3746/jkfn.2016.45.2.261

Roasting Conditions for Optimization of Citri Unshii Pericarpium Antioxidant Activity Using Response Surface Methodology  

Hwang, Hyun Jung (Department of Nutritional Science & Food Management, Ewha Womans University)
Park, Jeong Ah (Department of Nutritional Science & Food Management, Ewha Womans University)
Choi, Jeong In (Department of Nutritional Science & Food Management, Ewha Womans University)
Kim, Hee Soo (CoffeeJia Co., Ltd.)
Cho, Mi Sook (Department of Nutritional Science & Food Management, Ewha Womans University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.45, no.2, 2016 , pp. 261-268 More about this Journal
Abstract
This study was conducted to establish roasting conditions for optimization of Citri Unshii Pericarpium antioxidant activity using response surface methodology (RSM). A central composite design was applied to investigate the effects of two independent variables, namely roasting temperature ($40{\sim}100^{\circ}C$; $X_1$) and roasting time ($5{\sim}15min$; $X_2$), on responses such as electron donating ability ($Y_1$), total phenolic content ($Y_2$), total flavonoid content ($Y_3$), and hydroxyl radical scavenging activity ($Y_4$). The maximum electron donating ability was 72.38% at a roasting temperature of $71.12^{\circ}C$ and roasting time of 9.39 min. The maximum total phenolic content was 10.76 mg tannic acid equivalents/g at a roasting temperature of $69.71^{\circ}C$ and roasting time of 8.39 min. The maximum total flavonoid content was 105.99 mg quercetin equivalents/100 g at $72.54^{\circ}C$ and 8.64 min. The maximum hydroxyl radical scavenging activity was 60.33% at $68.97^{\circ}C$ and 9.84 min. Based on the superimposition of three dimensional RSM with respect to electron donating ability, total phenolic content, total flavonoid content, and hydroxyl radical scavenging activity under various conditions, optimum conditions were established as follows: roasting temperature of $70.90^{\circ}C$ and roasting time of 9.03 min.
Keywords
Citri Unshii Pericarpium; roasting conditions; antioxidant activity; response surface methodology; optimization;
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