鸡冠花叶色素的提取及理化性质研究

Study on extraction and physico-chemical properties of pigment from Celosia Cristata L.

本文研究了鸡冠花叶色素的提取条件和理化性质,结果表明,用料液比1∶50(g/mL)、10%乙醇作提取剂,在80℃恒温浸提60min,提取效率较好。鸡冠花叶色素属黄酮类色素,pH值对色素影响明显,低温时比较稳定。光照能加快色素降解。金属离子Na+、Ca2+、A13+、Zn2+对色素色泽无影响,而Cu2+、Fe3+、Pb2+有不良影响。色素抗氧化还原性能较好。蔗糖、柠檬酸和盐等添加剂对色素无影响。

Physico - chemical properties and extractions of the pigment in leafages of Celosia cristata L. were investigated. Results showed that good yield of pigment could be obtained by 10% C2H5OH solution at 80℃ for 60min with the solid -liquid ratio 1 ： 50 g/mL. The Celosia cristata L. pigment is classified to flavone, for which pH had significant effect on the tone of pigment. The pigment is stable to low temperature. Under sunlight, degradation of the pigment could be accelerated, but regardless of ultraviolet light. Metallic ions Na＋ , Ca^2＋ , Zn^2＋ , Al^3＋ had no effect on the tone of pigment, but Cu^2 ＋ , Fe^3＋ , Pb^2＋ had severe disadvantageous effect. This kind of pigment possesses better anti - oxidation ability. Addition of common salt, sucrose, citric acid had no effect on the pigment.