Storage Stability of Anthocyanin Pigment Isolated from a Wasted Grape Peels

거봉(Black Olympia) 포도과피로부터 분리된 Anthocyanin색소지 저장안정성

  • Hong, Joo-Heon (Department of Food Science and Technology, Kyungpook National University) ;
  • Chung, Hun-Sik (Food and Bio-Industry Research Institute, Kyungpook National University) ;
  • U, Hong (Faculty of National Scinece, Kyungsan University) ;
  • Youn, Kwang-Sup (Department of Food Science and Technology, Catholic University)
  • 홍주헌 (경북대학교 식품공학과) ;
  • 정헌식 (경북대학교 식품생물산업연구소) ;
  • 우홍 (경산대학교 자연과학부) ;
  • 윤광섭 (대구가톨릭대학교 식품공학과)
  • Published : 2002.09.01

Abstract

To develop the use of natural pigment for food, anthocyanins were isolated from grape peels which were wasted much in korea, and their characteristics were as fellows. pH has a marked influences on the color of the grape peels anthocyanin solution(GPAS). At low pH the color of GPAS was more stable than high pH. With increasing pH the color gradually fades as colorless pseudobases are formed. It showed characteristic bathnochromic shift as the solution increased. Among the sugars tested, glucose showed the most protective effect on the color of GPAS to raise the color stability, while fructose showed an adverse effect. Orgarnic acid such as citric acid prevented the degradation of anthocyanin, but ascorbic acid lowered stability of color considerably. The effect of light on GPAS was found to be very deleterious. The pigment degradation can be minimized by shielding the light from the pigment solution.

식품부산물인 포도과피에 함유된 수용성 색소인 anthocyanin을 새로운 천연식용색소로 개발하고자 pH, 당, 유기산 및 빛 등의 영향에 대한 색소안정성을 조사하였다. 포도과피의 anthocyanin 색소는 pH가 낮을수록 색깔의 강도가 높고 안정하였으며 pH가 증가함에 따라 최대흡수파장이 장파장 쪽으로 이동하는 bathochromic shift현상을 나타내었으며 저장기간에 따른 영향은 pH가 낮을수록 안정하였고 pH 가 증가할수록 색소파괴가 많아지는 경향이었다. 당류처리에 따라서는 glucose, mannose 처리구가 무처리 및 다른 당류처리구보다 색소안정화에 기여하였으며, 첨가농도별 영향은 0.3M에서 가장 우수하였다. 유기산 첨가에 따른 영향은 citric acid가 ascorbic acid보다 저장안정성이 월등히 우수하여 anthocyanin색소 첨가제로 유용함을 알 수 있었다. 빛에 대한 anthocyanin색소의 안정성은 암소에서 저장하는 것이 일광에 노출된 경우 보다 안정하여 anthocyanin첨가 식품의 포장시 빛을 차단함으로써 색소안정성을 증진시킬 수 있을 것으로 판단되었다.

Keywords

References

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