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Study on extraction and stability of potato purple pigment

Huaide Xu

Abstract

The extraction of potato purple pigment and its physics and chemistry stability were studied.Through orthogonal test,the optimal condition for potato purple pigment extraction was:30℃,time 60min,material-liquid ratio 1:20,80% alcohol.The result of stability showed that,potato purple pigment was sensitive to temperature,it was stable under 30℃ and in the condition of pH 6.The light could destruct its stability.The effects of glucose and sucrose were not very big.The anti-oxidized reducibility of pigment was not very good,specially the oxidative resistance.The effect of metal ion on pigment stability was:the effect of Fe3+ was the biggest,next was Cu2+,K+ and Al3+ were not big.

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Key concepts: Pigment, Extraction (chemistry), Chemistry, Sucrose, Metal ions in aqueous solution, Metal, Food science, Nuclear chemistry