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Characteristics and Stability of the Color of the Cranberry Solution

크랜베리 수용액 색상의 특성 및 안정성

  • Published : 2003.08.01

Abstract

Effects of pH, temperature, light, sugars, organic acids, metal ions, ascorbic acid, thiamine nicotinic acid and pyridoxine on the stability of the color of the cranberry solution were investigated. The pH had marked influences on the color of the cranberry solution: i.e., the color of the cranberry solution was more intense at low pH. It showed characteristic bathochromic shift as the pH of the solution increased. The half-lives of olor value were 34 days at 37$^{\circ}C$, 91 mins at 9$0^{\circ}C$ and 29 mins at 12$0^{\circ}C$. Light gave an adverse effect to the stability of the color. The color degradation can be minimized by shielding the light from the cranberry solution. Among the sugars tested, fructose was the most deleterious followed by sucrose, galactose, maltose and glucose. Fumaric acid was found to be the most effective in stabilizing the color followed by citric acid, malic acid, acetic acid, while tartaric acid was found to be deleterious. Among the metal ions tested N $a^{+}$ and $Mg^{2+}$ were found to be effective in stabilizing the color, while M $n^{2+}$ was found to be the most deleterious followed by F $e^{2+}$, $K^{+}$ and $Ca^{2+}$. Ascorbic acid was found to be deleterious considerably followed by thiamine, while nicotinic acid and pyridoxine were found to be effective in stabilizing the color feebly.or feebly.

크랜베리 수용액의 색상 안정성 에 대한 pH, 열, 광, 당, 유기산, 금속이온, 비타민 C, $B_1$, $B_3$$B_{6}$의 영향을 조사하였다. 크랜베리 수용액의 색상은pH가 낮을수록 농색화 효과가 높았고 pH가 높아질수록 최대흡수파장이 장파장 쪽으로 이동하는 bathochromic shift현상이 관찰되었다. 열의 영향에 대한 실험 결과, 색상의 반감기가 37$^{\circ}C$에서 34일, 9$0^{\circ}C$에서 91분, 12$0^{\circ}C$에서 29분으로 온도가 높을수록 색상의 반감기가 급격하게 짧아졌다. 광에 의해 색상의 안정성이 크게 저하되었는데, 형광보다 일광에 대한 영향이 더 컸으며 저장 시 광을 차단함으로써 안정성을 증진시킬 수 있었다. 당류 첨가는 오히려 무첨가구에 비해서 저장 안정성을 저하시켰고 fructose가 색상 저하를 가장 촉진하는 것으로 나타났다. 유기산 중 fumaric acid, citric acid, malic acid, acetic acid 순으로 색상 안정성에 효과가 있었으며 특히 fumaric acid는 색상안정화에 크게 기여하였다. 금속이온 중 $Na^{+}$$Mg^{2+}$은 색상안정화에 기여하였으나 $Mn^{2+}$은 색상의 안정성을 가장 크게 저하시켰고 다음으로 F $e^{2+}$, $K^{+}$, $Ca^{2+}$순으로 저하시켰다. 비타민 C와 $B_1$은 크랜베리 수용액 색상의 안정성을 저하시켰으며 특히 비타민 C는 색상의 안정성을 크게 저하시켰다. 반면 $B_3$, $B_{6}$는 색상의 안정성에 미약하게 기여하였다.

Keywords

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