康仙花色素的提取及其理化性质的研究  

Extraction the Pigment of Kang-xian Flower and Its Physical-chemical Properties

作　　者：王晓晴[1] 王榆元[2] 钟敏[1] 曾晓雄[1] 

机构地区：[1]南京农业大学食品科技学院,江苏南京210095 [2]南华大学化学化工学院,湖南衡阳421001

出　　处：《林产化学与工业》2013年第4期62-66,共5页Chemistry and Industry of Forest Products

基　　金：江苏省自然科学基金项目(BK2008425)

摘　　要：以康仙花为原料,提取康仙花色素并对其理化性质进行了研究。实验结果证明极性溶剂乙醇、甲醇和水对康仙花有效成分具有很强的提取能力,其中乙醇-水溶液(60∶40,体积比)对于康仙花色素的提取能力最大;康仙花色素在220及260 nm处均存在极高的吸收峰值;在酸性条件下康仙花色素颜色为红色(pH值1～4),且随pH值增大而变浅;在碱性条件下康仙花色素颜色转变为黄绿色;在pH值为1,60℃以下时,康仙花乙醇提取物对光、热具有较好的稳定性;Cu2+、Fe3+离子的存在对康仙花提取物的颜色和稳定性有很大的影响;食品添加剂Vc会破坏康仙花色素的稳定性;此外,康仙花的抗还原能力强于其抗氧化能力。The extraction conditions and physical-chemical properties of the pigment from Kang-xian flower were studied. Polar solvent such as ethonal, methonal and water were proved to effectively extract the pigment of Kang-xian flower. The most effective solvent to extract the pigment of Kang-xian flower was ethonal-water （60： 40, volume ratio）. The absorption peaks of the pigment from Kang-xian flower appeared at 220 nm and 260 nm by UV. The color of the pigment of Kang-xian was red at the pH 1-4, but it was faded as the pH value increased. It turned to yellow-green color when the pH value was over 7. The stability of the pigment of Kang-xian flower was good with the light and hot by pH 1 and the temperature was under 60C. Cu2＋ and Fe3＋ had great influ- ences on color and stability of the pigment. The food additive Vc also could decrease the stability of the pigment. Relative to the anti-oxidation, the anti-reduction ability of the pigment of Kang-xian flower was seemed more superior.

关 键 词：康仙花 理化性质 色素 

分 类 号：TQ35[化学工程] S685.11[农业科学—观赏园艺]