| 摘要 |
The present invention provides a method for producing a purified anthocyanin easily from a crude pigment fraction containing contaminants and the anthocyanin. A flavone that forms a metal complex with the anthocyanin and a metal ion of at least one of an alkaline-earth metal and a heavy metal is provided. Then, the flavonoid is brought into contact with the crude pigment fraction in a liquid in the presence of the metal ion of at least one of the alkaline-earth metal and the heavy metal, thereby forming a metal complex containing the anthocyanin, the flavonoid, and the metal ion. From the liquid, the contaminants contained in the crude pigment fraction are removed and the metal complex is collected. By subjecting this metal complex to, for example, an acid treatment, the anthocyanin is dissociatied from the metal complex. Thus, a high-purity anthocyanin is obtained.
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