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2012•Journal of Fuqing Branch of Fujian Normal UniversityRequires access

Study on Extraction and Stability of Red Pigment from Black Bean

Xiao Zhangliu

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Abstract

The optimum conditions for the extraction of red pigment from black bean with immersing were studied and the stability was investigated.The result showed that the optimum conditions of immersing technique were: the ratio of 9% hydrochloric acid to black bean weight 1:25,black bean was immersed at 70℃ for 2h.The red pigment exhibits strong resistance to food additives and reducing agent;the oxidation resistance and light stability is poor;Fe3+,zn2+,Cu2+ metal ions have the obvious influence on the stability of pigment;the influence of Ca2+,Al3+ on the stability of the pigment is unapparent.

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What this paper is about

The optimum conditions for the extraction of red pigment from black bean with immersing were studied and the stability was investigated.The result showed that the optimum conditions of immersing technique were: the ratio of 9% hydrochloric acid to black bean weight 1:25,black bean was immersed at 70℃ for 2h.The red pigment exhibits strong resistance to food additives and reducing agent;the oxidation resistance and light stability is poor;Fe3+,zn2+,Cu2+ metal ions have the obvious influence on the stability of pigment;the influence of Ca2+,Al3+ on the stability of the pigment is unapparent.

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Available abstract

The optimum conditions for the extraction of red pigment from black bean with immersing were studied and the stability was investigated.The result showed that the optimum conditions of immersing technique were: the ratio of 9% hydrochloric acid to black bean weight 1:25,black bean was immersed at 70℃ for 2h.The red pigment exhibits strong resistance to food additives and reducing agent;the oxidation resistance and light stability is poor;Fe3+,zn2+,Cu2+ metal ions have the obvious influence on the stability of pigment;the influence of Ca2+,Al3+ on the stability of the pigment is unapparent.

Key concepts: Pigment, Hydrochloric acid, Extraction (chemistry), Chemistry, Metal ions in aqueous solution, Metal, Chromatography, Inorganic chemistry

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