摘要
以红米为原料,利用柠檬酸、乙醇为提取剂提取红米色素。通过单因素和正交试验得到了最佳提取工艺参数,即乙醇浓度60%、柠檬酸浓度0.5%、提取级数2级、提取温度50℃。在此最优条件下,红米色素的最高提取率为18.98%。对红米色素稳定性进行了研究,结果表明:红米色素稳定性较好。热、酸性条件、金属离子对色素的稳定性影响不大;还原剂、蔗糖和葡萄糖有护色作用;但对氧化剂敏感,易发生褪色,日光照射也能导致色素颜色变化。
With red rice as raw material,citric acid and ethanol were used to extract red rice pigment. Through single factor and orthogonal test,the optimum extraction parameters were obtained,which were ethanol concentration 60%,citric acid concentration 0.5%,extraction series 2 and extraction temperature 50 ℃. Under the optimum conditions,the highest extraction rate of red rice pigment was 18.98%. The stability of the red pigment was studied. The results showed that the stability of the red pigment was good. Heat,acid conditions,metal ions had little effect on the stability of the pigment. Reducing agent,sucrose and glucose had protective effect. But the pigment was sensitive to oxidant,which was easy to fade. The sun exposure could also lead to changing the color.
出处
《粮食与油脂》
北大核心
2016年第7期10-13,共4页
Cereals & Oils
基金
辽宁省教育科学规划课题(JG14DB310)
辽宁省普通高等教育本科教学改革研究项目(UPRP20140116)
关键词
红米色素
提取
稳定性
red rice pigment
extraction
stability
作者简介
薛博（1984-），女，讲师，硕士研究生，研究方向为粮油加工与转化。
