Comparison on the Extraction Efficiency and Antioxidant Activity of Flavonoid from Citrus Peel by Different Extraction Methods

추출방법에 따른 감귤 과피 유래 Flavonoid의 추출효율 및 항산화 효과에 대한 비교

  • Cheigh, Chan-Ick (Dept. of Food Science and Engineering, Ewha Womans University) ;
  • Jung, Won-Guen (Dept. of Food Science and Engineering, Ewha Womans University) ;
  • Chung, Eun-Young (Dept. of Food Science and Engineering, Ewha Womans University) ;
  • Ko, Min-Jung (Dept. of Food Science and Engineering, Ewha Womans University) ;
  • Cho, Sang-Woo (Bio Business division, Seoul Perfumery Co.) ;
  • Lee, Jae-Hwan (Dept. of Food Science and Technology, Seoul National Univ. of Technology) ;
  • Chang, Pahn-Shick (Program in Food Science and Biotechnology, Seoul National University) ;
  • Park, Young-Seo (Dept. of Food and Bioengineering, Kyungwon University) ;
  • Paik, Hyun-Dong (Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Kim, Kee-Tae (Food Science and Biotechnology of Animal Resources, Konkuk University) ;
  • Chung, Myong-Soo (Dept. of Food Science and Engineering, Ewha Womans University)
  • 최찬익 (이화여자대학교 식품공학과) ;
  • 정원근 (이화여자대학교 식품공학과) ;
  • 정은영 (이화여자대학교 식품공학과) ;
  • 고민정 (이화여자대학교 식품공학과) ;
  • 조상우 ((주)서울향료 바이오사업부) ;
  • 이재환 (서울산업대학교 식품공학과) ;
  • 장판식 (서울대학교 식품생명공학) ;
  • 박영서 (경원대학교 식품생물공학과) ;
  • 백현동 (건국대학교 축산식품생물공학) ;
  • 김기태 (건국대학교 축산식품생물공학) ;
  • 정명수 (이화여자대학교 식품공학과)
  • Received : 2010.05.12
  • Accepted : 2010.05.24
  • Published : 2010.05.30

Abstract

The extraction of polyphenol and flavonoid from citrus peel was performed by the ethanol, sugar, hot water (80$^{\circ}C$), and subcritical water extraction methods. The maximum yields of total polyphenolic compounds (27.25${\pm}$1.33 mg QE/g DCP, QE and DCP indicate quercetin equivalent and dried citrus peel, respectively) and flavonoids (7.31${\pm}$0.41 mg QE/g DCP) were obtained by subcritical water extraction (SWE) with operating conditions of 190$^{\circ}C$, 1300 psi, and 10 min. The yields by SWE were over 7.2-, and 8.5-fold higher than those of total polyphenols (3.79${\pm}$0.73 mg QE/g DCP) and flavonoids (0.86${\pm}$0.27 mg QE/g DCP) obtained using the ethanol extraction, which showed the highest extraction efficiency among tested conventional methods, respectively. Antioxidant activities of extracts obtained by different methods showed no significant differences. However, the relative antioxidant yield per 1 g dried citrus peel by SWE (190$^{\circ}C$, 10 min) was over 9.5-fold higher than that by the ethanol extraction.

본 연구에서는 감귤 과피 가공부산물로부터 기능성 polyphenol 및 flavonoid가 새로운 추출방법인 아임계 추출법을 통해 추출되었고, 열수(80$^{\circ}C$), 에탄올, 설탕용액을 이용한 기존 추출법과의 추출효율이 비교 분석되었다. 건조된 감귤 과피로부터 총 polyphenol(27.25${\pm}$1.33 mg QE/g DCP) 및 flavonoid(7.31${\pm}$0.41 mg QE/g DCP)에 대한 최대 수율이 아임계 추출법(190$^{\circ}C$, 1300 psi, 10 min)을 통해 획득되었으며, 이것은 기존 추출법 가운데 가장 높은 수율을 보인 에탄올 추출법을 통한 총 polyphenol (3.79${\pm}$0.73 mg QE/g DCP) 및 flavonoid(0.86${\pm}$0.27 mg QE/g DCP) 수율 대비 7.2배와 8.5배 이상 더 높은 것이었다. 추출방법에 따른 감귤 과피 추출물의 항산화 활성은 큰 차이를 나타내지 않았으나, 이러한 결과는 건조 감귤 과피 1 g 당 아임계 추출법(190$^{\circ}C$, 1300 psi, 10 min)에 의한 항산화 성분의 상대 수율(relative yield, %)이 다른 추출방법을 통해 획득된 것보다 대략 9.5배 이상 더 높다는 것을 설명하는 결과로, 아임계 추출법이 기존의 전통적 추출법에 비하여 감귤 과피의 기능성 polyphenol 및 flavonoid를 추출하는데 매우 적합한 방법임을 제시하고 있다.

Keywords

Acknowledgement

Supported by : 한국연구재단

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