Study on Stability Effect of pH and Fe3+ on Pokeberry Pigment

Abstract

Abstract: This article studied the stability effect of pH value and Fe3+ on pokeberry pigment. The results indicated that, the pokeberry pigment is stabler on the pH5.0 condition, the stability reduces on acidity and in the alkalinity condition, In the citric acid - sodium hydrogen phosphate buffer solution, as a result of formation of the reddish purple color Fe3+- citric acid complex compound, the existence of Fe3+ has effect on increase of pokeberry pigment corlor.

Key words: pokeberry pigment, pH value, Fe3+, stability

Yang-Zheng-Shui, Luo-Xian-Hua, Yu-Jian-Sheng. Study on Stability Effect of pH and Fe3+ on Pokeberry Pigment[J]. FOOD SCIENCE, 2006, 27(10): 78-80.

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Study on Stability Effect of pH and Fe3+ on Pokeberry Pigment

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