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作 者 ：苏燕评 陈郑镔 张良 陈炳华 刘剑秋

期 刊 ：植物学通报 2003年 20卷 03期 页码：336-341

关键词：多花野牡丹；天然色素；提取；稳定性；花青苷；

摘 要 ：本文对多花野牡丹（Melastoma affine）果实胎座的色素进行了理化性质的探讨，对光、温度、氧化还原介质、7种金属离子、葡萄糖、蔗糖、苯甲酸钠对色素稳定性的影响进行了研究。结果表明，该色素为水溶性花青苷类色素，它在60 ℃以下稳定性较好，对光的耐受性较差。色素在酸性条件下稳定性好，耐还原性也较好，但耐氧化性较差。7种金属离子中，Fe3+、Cu2+、Mn2+、Zn2+对色素有明显降解作用，而Na+、Mg2+、Al3+对色素稳定性较好并有不同程度的护色作用。葡萄糖、蔗糖、苯甲酸钠对色素无不良影响。

Abstract:The paper reports the preliminary study on the feasibility of red pigment of Melastoma affine being used as a new type of natural food pigment. It was tested that the effects of light, temperature, pH value, oxide-reducing medium, 7 kinds of metal ions, and 3 kinds of food additives on stability of the pigment. The results showed that the pigment belongs to water-soluble anothocyanins. It is stable below 60 ℃ and pH<6 but sensitive to light intensity and oxidant. Fe3+, Cu2+, Mn2+, Zn2+ evidently degrade the pigment, but Na+,Mg2+, Al3+, glucose, sucrose and sodium benzoate have no harmful effect on it.

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