Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Studies on Characteristics and Stability of Anthocyanin Pigment Extracted from Korean Purple - Fleshed Potatoes

한국산 유색감자 색소의 특성 및 안정성에 관한 연구

  • 박홍주 (농촌진흥청 농업과학기술원 농촌자원개발연구소) ;
  • 전태욱 (농촌진흥청 농업과학기술원 농촌자원개발연구소) ;
  • 이성현 (농촌진흥청 농업과학기술원 농촌자원개발연구소) ;
  • 조용식 (농촌진흥청 농업과학기술원 농촌자원개발연구소) ;
  • 조수묵 (농촌진흥청 농업과학기술원 농촌자원개발연구소) ;
  • 장규섭 (농촌진흥청 농업과학기술원 농촌자원개발연구소)
  • Published : 2004.11.01
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Abstract

Effects of pH, sugar, ascorbic acid, organic acids and light sources on the stability of anthocyanin pigment extracted from Korean purple-fleshed potatoes (PL-6, PL-28, PL-31 and Jasim) were studied. The pH had remarkable influence on the color stability of anthocyanin pigment. With increasing pH, the color gradually fades as colorless pseudobases are formed. In acidic pH, anthocyanin was stable, but with increasing pH the color gradually changed to colorless. The addition of sugar decrease in color stability of the pigment during storage period. The most of organic acids, such as a tartaric, citric and succinic acids, were found to improve the stability of the pigment, while malic and malonic acid reduced the stability of the pigment. The addition of ascorbic acid considerable decreased in anthocyanin pigment stability, but the effect was not decreased by adding thiourea. The effect of light sources such as a darkroom, a fluorescent light, and sunlight, reduced gradually the stability of anthocyanin pigment. Therefore the pigment degradation could be minimized by shielding the light from the pigment.

유색 감자(PL-6, PL-28, PL-31과 Jasim)에 함유된 수용성 색소인 anthocyanin의 pH, 당, ascorbic acid, 유기산과 광원에 대한 색소 안정성을 조사하였다. pH는 유색감자의 anthocyanin 색소 안정성에 영향을 주는 것으로 나타났는데, pH가 낮을수록 색도가 높고 안정하였으며 pH가 높아질수록 색소 파괴가 많아지는 경향을 나타내었다. 유색 감자의 anthocyanin 색소에 당 첨가 시 저장 기간동안 점차적으로 색소가 약간 감소하는 것으로 나타났다. Tartaric, citric, succinic acid와 같은 대부분의 유기산은 anthocyanin 색소의 안정성을 개선시킨 반면 malic, malonic acid는 색소의 안정성을 감소시켰다. 유기산 중 하나인 ascorbic acid만을 첨가했을 때 anthocyanin 색소 안정성은 계속 감소하였으나 thiourea를 함께 사용한 경우 anthocyanin 색소의 안정성 유지에 효과가 있었다. 암실, 형광 그리고 햇빛에 대한 유색감자 anthocyanin 색소의 안정성은 점차 감소하며 빛으로부터 색소를 차단함으로서 색소분해를 최소화할 수 있을 것으로 판단된다.

Keywords

References

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