万寿菊食用色素及其稳定性研究

以万寿菊花序为实验材料，从光，热，pH值，还原介质，氧化介质，蔗糖，防腐剂，金属离子等对色素稳定性的影响进行了研究。结果表明：万寿菊色素的耐光，耐热，耐还原性较差；对氧化剂有一定耐受性，适用pH值范围广；蔗糖以及金属离子Na^ ,K^ 对色度基本上无影响，而Fe^2 ,Sn^2 ,Zn^2 对色素溶液颜色的稳定性只有微弱影响；而Fe^3 ,Cu^2 ,Ca^2 的加入则改变了色素溶液的颜色，对色度有一定的影响。

The Research of the Edible Pigment of Inflorescence of Tagetes erecta L. and Its Stability

The paper is based on a research of the inflorescence of Tagetes erecta L. The experiment studies also include the preliminary study of effects of light, heat, pH value, reductant, oxide , sucrose, preservative and metal ion on the stability of pigment. It proves that pigment is poor in resistance against light, heat and reductant. And it can endure oxide to some extent. The pigment can be applied to pH value widely. It is also found in the experiments that sucrose, preservative and metal ions such as Na +?K + do not basically exert negative effect on the stability of the pigment while other ions such as Fe 2+ ?Sn 2+ ?Zn 2+ have faintly negative effects on the chroma , and the increasement of ions such as Cu 2+ ?Ca 2+ have changed the color of solution of pigment and influenced on the chroma of pigment.