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Vitamin C, Total Polyphenol, Flavonoid Contents and Antioxidant Capacity of Several Fruit Peels

과일 껍질의 비타민 C, 폴리페놀, 플라보노이드 함량과 항산화 활성

  • Lee, Min-Young (Department of Food and Nutrition, Sungshin Women's University) ;
  • Yoo, Mi-So (Department of Food and Nutrition, Sungshin Women's University) ;
  • Whang, Yoo-Jeong (Department of Food and Nutrition, Sungshin Women's University) ;
  • Jin, Yoo-Jeong (Department of Food and Nutrition, Sungshin Women's University) ;
  • Hong, Myung-Hee (Department of Food and Nutrition, Sungshin Women's University) ;
  • Pyo, Young-Hee (Department of Food and Nutrition, Sungshin Women's University)
  • 이민영 (성신여자대학교 식품영양학과) ;
  • 유미소 (성신여자대학교 식품영양학과) ;
  • 황유정 (성신여자대학교 식품영양학과) ;
  • 진유정 (성신여자대학교 식품영양학과) ;
  • 홍명희 (성신여자대학교 식품영양학과) ;
  • 표영희 (성신여자대학교 식품영양학과)
  • Received : 2012.08.13
  • Accepted : 2012.09.11
  • Published : 2012.10.31

Abstract

The aim of this study was to evaluate the antioxidant activity, total phenolics, flavonoids, and vitamin C contents in peels of 11 commercial fruits commonly consumed in the Republic of Korea. The antioxidant activities were evaluated by ABTS, DPPH radical scavenging methods and reducing power. The peels of plum (Prunus spp.) and golden kiwifruit (Actinidia chinensis) exhibited the highest values of antioxidant activity and total phenolics, while the highest level of ascorbic acid was recorded in the peel of citrus fruit (p<0.05). There were positive correlations between the antioxidant activity assessed by both reducing power and ABTS methods and total polyphenol content ($R^2$=0.6356), suggesting that phenolic compounds are the major contributors to these activities. The results indicate that plum and golden kiwifruit peels can be used as natural antioxidant ingredients and in production of functional foods in the Korean diet.

국내에서 시판되는 11 종의 과일을 선별하여 과일 껍질에 함유된 항산화 성분과 항산화 활성을 측정하여 이들 인자간의 상관성을 평가하였다. 동결건조 시료의 80% 에탄올 추출물에 함유된 총 폴리페놀(44.1-178.3 mg GAE/g dw), 플라보노이드(4.1-40.3 mg QE/g dw), 비타민 C의 함량(0.12-4.60 mg/g dw)을 측정하고, DPPH(평균 89.1% 소거능)와 ABTS 라디칼 소거활성(평균 84.2% 소거능) 및 환원력(186.2-953.8 mM AAE/g dw)을 측정하여 시료의 항산화능을 평가한 결과는 다음과 같다. 총페놀 및 플라보노이드 함량은 자두>골드키위>포도껍질 등의 순위로 가장 높았으며, ABTS 라디컬 소거능과 환원력에 의한 항산화 활성 역시, 자두>골드키위>포도껍질 순으로 높게 나타나 이들의 항산화능은 주로 폴리페놀 성분에 기인한 것으로 밝혀졌다($R^2$=0.6356). 그러나 비타민 C의 함량이 높은 귤(4.60 mg), 오렌지(2.27 mg), 참외껍질(2.16 mg) 등의 항산화 활성은 DPPH 라디컬 소거능과 정의 상관관계($R^2$=0.5201)를 나타내어 본 실험에 사용된 대부분의 과일 껍질은 자체내 함유된 폴리페놀 화합물이나 비타민 C 등의 항산화 성분 및 농도에 따라 비교적 높은 항산화 활성을 나타내었다. 특히 폴리페놀 함량과 항산화 활성이 가장 높게 나타난 자두와 골드키위의 껍질은 천연 항산화제뿐 아니라 기능성 식품 소재로서의 활용 가능성이 제시된다.

Keywords

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