摘要
在确定了黄花马蹄莲色素所属类型的基础上,采用体外试验研究了该色素的优化提取及其在多种物理化学条件下的稳定性。通过分析该色素提取液的特征吸收峰,确认其为矢车菊色素衍生物的一种。通过4因子3水平的正交设计,得出它的最佳提取条件:使用浓度90%的乙酸,以14∶的固(苞片)液(乙酸溶液)质量比在90℃下提取10 min。其显著特征是,在100℃条件下及pH值0.0～14.0的范围内均表现出很强的稳定性,这在天然色素中很少见。它对Al3+、Mg2+、Mn2+、Zn2+、Na+、K+、葡萄糖、蔗糖及120 h内的紫外可见光照射也同样表现出很强的稳定性,但对Cu2+、Fe3+、Pb2+、Vc、Na2SO3和H2O2表现出不稳定性。
In order to make clear the structure and the character of the pigment,which was extracted from the yellow calla and to realize the influence of many physics and chemical factors on this pigment, we extrat＇ted the piglnent from enough yellow callas. From this study, we knew that the pigment belonged to a ramification of cornflower pigment. The best extractive condition was that the concentration of acetic acid was 90 % and temperature was 90 ℃ for 10 minutes for the quality ratio of 1 to 4. The notable character was acid stability （ pH 0.0-7.0 ）, alkali stability（ pH 8.0-14.0）,light stabilit）in high temperature of 100℃. We seldom found these characters in other pigments. It can keep constant when the solution of ion Al^3＋、Mg^2＋、Mn^2＋、Zn^2＋、Na^＋、K^＋, dextrose and cane sugar into pigment solution. In contrast, the pigment could not keep constant when it mingled in the solution of ion Cu^2＋、Fe^3＋、Pb^2＋ and the solutions of Vc、Na2SO3、H2O2 and Sodium Benzoate.
出处
《安徽农业科学》
CAS
北大核心
2005年第12期2365-2368,共4页
Journal of Anhui Agricultural Sciences
关键词
黄花马蹄莲
天然色素
稳定性
提取
Yellow calla
Natural pigment
Stability
Extraction
