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KMID : 0380620130450030299
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Korean Journal of Food Science and Technology
2013 Volume.45 No. 3 p.299 ~ p.304
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Antioxidant Capacity and Bioactive Composition of a Single Serving Size of Regular Coffee Varieties Commercially Available in Korea
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Kim Mi-Jeong
Park Ji-Eun
Lee Joo-Hyun
Choi Na-Rae
Hong Myung-Hee
Pyo Young-Hee
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Abstract
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The major hydrophilic bioactive compounds (chlorogenic acid, caffeine, total phenolics, and flavonoids) and the antioxidant capacity in a single size were evaluated for regular coffee varieties commercially available in Korea. The content of total phenols (63.83-110.12 mg gallic acid equivalents) and flavonoids (35.27-69.27 mg catechin equivalents) were spectrophotometrically determined, and the content of chlorogenic acid (5.17-69.78 mg) and caffeine (74.38-146.32 mg) were determined using HPLC-UV. All varieties of regular coffee studied showed antioxidant potential (88.78-487.52 mg trolox equivalents/serving size), which was conferred by their concentrations of phenolic compounds, caffeine and chlorogenic acid. There were significant (p<0.01) correlations between the total phenolics (r2=0.732) and flavonoids (r2=0.8705) and the antioxidant capacity, suggesting that these components were likely a significant contributor to the antioxidant capacity of commercial regular coffee brews.
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KEYWORD
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coffee, antioxidant capacity, chlorogenic acid, caffeine, total phenolic
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