沙枣黄色素的提取及稳定性的研究

Study on extraction and stability of yellow pigment from Elaeagnus angustifolia L.

对沙枣黄色素的提取及稳定性进行了系统研究,结果表明:沙枣黄色素的最大吸收波长λmax=322nm,从沙枣中提取色素的最佳工艺条件为:以pH3的70%的乙醇为浸提剂、提取温度为50℃、提取时间3h、液料比为1∶35。该色素耐光、耐热,氧化剂、还原剂和常用的食品添加剂蔗糖、苯甲酸钠、碳酸氢钠对色素稍有影响,金属离子Cu2+、Fe3+、Zn2+、Na+、Ca2+、K+离子对色素都有增色作用,Mn2+对其有减色作用。

Study on extraction and stability of yellow pigment from Elaeaguns angustipolia L. the yellow pigment has the maximum absorption wavelength λmax=322nm. The satisfactory solvent is alcohol. The optimum conditions were： concentration of solvent 70%, pH=3 and temperature of extraction 50℃. It is quite stable lightfast, heatproof, but antioxidizing and antireducing. The pigments are hardly affected by common food additives, such as cane sugar, most of the metal ions except for Cu^2＋, Fe ^3＋,Zn^2＋, Na^＋, Ca^2＋, K^＋.