郁金香红色素的提取及性质研究

Study on extraction and characterization of red pigment from Tulipa gesneriana

研究了郁金香花红色素的提取条件和理化性质。结果表明,用料液比1∶30(g/mL)、pH1(10%盐酸调)的95%乙醇作提取剂、在80℃恒温提取20min,提取效率较好。郁金香花红色素属花青素类色素,易溶于水和酸性乙醇;pH值对色素影响明显,在酸性条件下色泽稳定且具有热稳定性。光照能加快色素降解。金属离子Na+,Ca2+,A13+,Cu2+,Zn2+对色素色泽无影响,而Fe3+,Pb2+有不良影响。色素的色素抗氧化较好而抗还原性能较差。蔗糖、葡萄糖和盐等添加剂对色素无影响。

Physical-chemical properties and extractions of the red pigment in flowers of Tulipa gesneriana were investigated. Results showed that good yield of pigment could be obtained by 95% C2H5OH solution （with 10M HCl） of phl at 80℃ for 20min with the solid-liquid ratio 1 ： 30（g/mL）. The Tulipa gesnerianared pigment is classified to anthocyanins, it can be dissolved in water and acidity ethanol ,for which pH had significant effect on the tone of pigment. The pigment is suitable to acid environment while its good heat resistance. Under sunlight, degradation of the pigment could be accelerated. Metallic ions Na^＋,Ca^2＋,A^13＋,Cu^2＋,Zn^2＋ had no effect on the tone of pigment, but Fe^3＋ ,Pb^2＋ had severe disadvantageous effect. This kind of pigment possesses better oxidation ability. This kind of pigment has better endurance capability against oxidizing agent, but it has less resistance capability against reducing agent. Addition of glucose, sucrose had no effect on the pigment.