Antioxidant Activity and Total Phenolic Contents of Grape Juice Products in the Korean Market

시판 포도 주스의 항산화 활성 및 총 페놀 함량

  • Lee, Hye-Ryun (Faculty of Life and Food Sciences, Kyungpook National University) ;
  • Jung, Bo-Ra (Faculty of Life and Food Sciences, Kyungpook National University) ;
  • Park, Joo-Young (Faculty of Life and Food Sciences, Kyungpook National University) ;
  • Hwang, In-Wook (Faculty of Life and Food Sciences, Kyungpook National University) ;
  • Kim, Suk-Kyung (Faculty of Life and Food Sciences, Kyungpook National University) ;
  • Choi, Jong-Uck (Faculty of Life and Food Sciences, Kyungpook National University) ;
  • Lee, Sang-Han (Faculty of Life and Food Sciences, Kyungpook National University) ;
  • Chung, Shin-Kyo (Faculty of Life and Food Sciences, Kyungpook National University)
  • 이혜련 (경북대학교 생명식품공학부) ;
  • 정보라 (경북대학교 생명식품공학부) ;
  • 박주영 (경북대학교 생명식품공학부) ;
  • 황인욱 (경북대학교 생명식품공학부) ;
  • 김숙경 (경북대학교 생명식품공학부) ;
  • 최종욱 (경북대학교 생명식품공학부) ;
  • 이상한 (경북대학교 생명식품공학부) ;
  • 정신교 (경북대학교 생명식품공학부)
  • Published : 2008.06.30

Abstract

The total phenolic content and antioxidant activities of grape and fruit juice products in the Korean market were examined The total phenolic content was measured by the Folin-Ciocalteau method, and antioxidant activities were evaluated by FRAP and DPPH assays. The total phenolic content of the grape juice products were within the range $57.95{\sim}205.64\;mg/L$. Orange juice had the strongest antioxidant activity, apple juice the weakest, and grape juice was intermediate. Grape juice products exhibited a wide range of antioxidant activities. Especially, GU4, GU5, and GU9 exhibited about 80% of the DPPH radical scavenging activities, similar to the antioxidant activities by the FRAP assay. The antioxidant activities by FRAP and DPPH assays were well correlated with the total phenolic content of grape juice products (> 0.97).

국내에서 제조 및 시판되고 있는 사과를 비롯한 과일 주스 5종, 포도 주스 10종의 총 페놀 함량과 항산화 활성을 DPPH 방법과 FRAP 방법으로 조사하였다. 시판 과일 주스 중 오렌지의 총 페놀 함량이 114.09 nlg/L로 가장 높게 나타났고, 포도주스 10종은 $57{\sim}205\;mg/L$의 함량으로 제품 별로 다양하게 나타났다. 과일 주스의 DPPH radical 소거 활성은 자몽이 가장 높았으며 사과, 파인애플이 낮았다. 포도주스의 항산화 활성은 제품에 따라 다양하게 나타났는데, 시료별로 GU4, GU5, GU9가 거의 80%정도의 DPPH radical 소거 활성을 보였다. FRAP방법에 의한 항산화 활성 역시 DPPH 라디칼 소거 활성과 유사한 결과이었다. 그리고 DPPH 및 FRAP, 총 페놀 함량 간의 상관계수는 각각 0.97 이상으로 매우 높은 상관성을 나타내었으며, 따라서 총 페놀 함량이 높을수록 과일 주스 제품의 항산화 활성능력이 크게 나타났다.

Keywords

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