食品科学 ›› 2006, Vol. 27 ›› Issue (8): 98-102.

• 基础研究 • 上一篇    下一篇

叶子花红色素的提取及其稳定性研究

 刘建新, 胡浩斌,  赵国林   

  1. 陇东学院生命科学系; 陇东学院化学系;
  • 出版日期:2006-08-15 发布日期:2011-10-14

Study on Extraction and Stability of Red Pigment from Bougainvillea glabra

 LIU  Jian-Xin, HU  Hao-Bin,   Zhao-Guo-Lin   

  1. 1.Department of Life Science,Longdong University,Qingyang 745000,China;2.Department of Chemistry,Longdong University,Qingyang 745000,China
  • Online:2006-08-15 Published:2011-10-14

摘要: 以叶子花苞叶为原料提取红色素,经正交试验选择最佳提取条件,并对光、温度、pH值、氧化还原介质、6种金属离子和4种食品添加剂对色素稳定性的影响进行了研究。结果表明,叶子花红色素为水溶性花青素的花色苷,在可见光区的最大吸收波长λmax=541nm。最佳提取条件为:以5%乙醇为提取剂,配料比为1:15,25℃下保温浸提3次,每次1h。该色素在70℃以下稳定性较好,对光的耐受性较差;色素在酸性条件下稳定,耐还原性强,但耐氧化性较差。6种金属离子中,Cu2+、Zn2+、Fe3+对色素有明显的破坏作用,而Mn2+、Mg2+、Al3+对色素稳定性较好,并有不同程度的护色作用。葡萄糖、NaCl、VC、苯甲酸钠对色素无不良影响。

关键词:  , 叶子花, 红色素, 薄层层析, 提取, 稳定性

Abstract: Red pigment was extracted using Bougainvillea glabra Choisy bract as raw material.The optimum extracting conditions were selected by the orthogonal experiment,while the effects of light,temperature,pH value,oxide-reducing medium,6 kinds of metal ions and 4 kinds of food additives on the red pigment stability were studied respectively.The results showed that the pigment belongs to water-soluble anthocyanins,at the maximum absorption wavelength was 541nm,and the optimum extracting solvent was 5% ethanol,the sample weight to solvent volume 1:15 at 25℃ for 3 times,with an hour each time.It is stable below 70℃ and pH<7,but sensitive to light intensity and oxidant.Cu2+,Zn2+,Fe3+ evidently degrade the pigment,but Mn2+,Mg2+,Al3+,glucose,NaCl,VC and sodium benzoate have no harmful effect on it.

Key words:  , Bougainvillea glabra Choisy; red pigment; thin-layer chromatography; extraction; stability;