用体积分数95%的乙醇对野菊花的黄色素进行超声提取,在不同超声频率、提取温度、料水比、提取时间等条件下对野菊花黄色素的提取工艺进行研究,并对色素在不同温度、光照、pH值、氧化剂、还原剂、食品添加剂以及一些金属离子条件下的稳定性进行研究。结果表明,该色素适宜提取工艺为:超声频率45 kHz,提取温度为60℃,料水比为1∶50(g∶mL),提取时间为50 min。野菊花黄色素的耐光性差,耐热性较好,在酸性、还原剂、苯甲酸钠中的稳性较差,在碱性、氧化剂、Vc、柠檬酸、葡萄糖溶液中稳定性较高,色素对多数金属离子溶液的稳定性较高,K+、Fe3+、Al3+对色素有一定的减色作用。

This paper uses 95% ethanol for Flower of Indian Dendranthema yellow pigment ultrasonic extraction,in different ultrasonic frequency,extraction temperature and the ratio of material to water,extracting time etc condition of the extraction technology of yellow pigment had studied,and of pigment in different temperature,light,pH,oxidant,reductant,food additives and some metal ion of conditions of stability for research.The results show that the pigment best extraction process for: ultrasonic frequency 45 kHz,extraction temperature for 60℃,ratio of material to water 1:50,extracting time for 50 min.The yellow pigment stability is poor in light,acidic,reductant,sodium benzoate.In heat,alkaline,oxidant,Vc,citric acid,glucose solution stability is high.Its stability to most metal ion is high,but K+,Fe3+and Al3+ can reduce its colour.