月见草花黄色素的稳定性测定

Study on the Chemistry Stability of Yellow Pigment from Oenothera biennis L.Flower

研究了光、热、酸、碱、氧化剂、还原剂、金属离子、蔗糖、Vc等添加剂对用95%乙醇浸提的月见草花黄色素溶液稳定性的影响,结果表明:该色素易溶于95%的乙醇、无水乙醇、丙酮、乙酸乙酯等溶剂.对光、热、碱、氧化剂、金属离子(Na+,Ca2+,Mg2+)及添加剂有一定的稳定性,而对酸、还原剂的稳定性不太好,Cu2+和Fe3+对色素溶液有一定的影响.

This paper studied the stability of yellow pigment from Oenothera biennis L. flower in the following different additive agents ： light, heat, acid, sodium hydroxide, hydrogen peroxide, reducer, metal ions, saccharose, Vc, etc. The experimental results show that the pigment can easily dissloved in the solvent of 95 % ethanol, pure ethanol, acetone, ether, ethyl ethanoate etc. It has a certain stability toward light, heat, sodium hydroxide, hydrogen peroxide, metal ions （Na ^＋ , Mg^2 ＋ , Ca^2 ＋ ） and food additives ect, however, it has less stability to solutions of hydrochloric acid, sodium sulrite, Cu^2＋ and Fe^3 ＋ gave undesirable effects.