摘要
用紫外可见光谱分析,初步判断冬枣红色素的组成为类黄酮(包括黄酮类)、花色素苷类。通过对冬枣果皮红色素的NaOH提取液进行不同处理,对果实色素的稳定性进行了研究。在不同温度下水浴2 h,目测其外观颜色随着温度的升高而逐渐变浅,随着温度的升高,其吸光值呈现逐渐减小的趋势,温度越高,色素损失越多。进行避光、直射光、室内散射光处理发现色素对光照较敏感,易损失,应进行避光保存。供试的2种金属离子,钾离子和钙离子在各吸收峰处都有上升的趋势。红色素对氧化还原剂的处理比较稳定。不同pH值对冬枣色素的颜色变化及稳定性有一定影响。
This paper analyzed winter jujube pigment with UV-visible, determined was composed with flavon pigment was studied. The higher the temperature dispersion light, it was stored in no light envir Reductant-oxidant has oids and anthocyanin. With treatment of NaOH distilli results showed high that water temperature can reduce that red pigment stability of fruit absorbance. The is, the lower absorbance is. With treatment of light avoidance, straight light, discovered that the red pigment was suseeptive to light, the pigment should be onment. Among 2 cations, K^＋ , Ca^2＋ have a increasing at the absorption peak. little effect on stability of the pigment. Different pH also affected the colour change and stability of red pigment of winter jujube peel.
出处
《西北农业学报》
CAS
CSCD
北大核心
2006年第6期144-147,共4页
Acta Agriculturae Boreali-occidentalis Sinica
关键词
冬枣
色素
稳定性
Winter jujube
Pigments
Stability
