2010•China Food AdditivesRequires access

The study of the extraction and stability of sweet potato leaf pigments

Ping Yang

Abstract

The paper explores purple sweet potato pigment extraction.Optimum conditions and stability were studied.The best extracting conditions were:95% ethanol at 50℃ for 30h.pH has a major influence:the pigment was more stable under acidic conditions and very sensitive to the light.Ca2+、Mg2+、Zn2+、Cu2+、Na+had no effect on the pigment stability while Fe3+and Sn4+caused the pigment color to change.

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Available abstract

Key concepts: Pigment, Extraction (chemistry), Chemistry, Biological pigment, Botany, Ethanol, Food science, Chromatography