玉米黄色素稳定性的研究

以玉米为原料,对影响玉米黄色素稳定性的因素进行研究.结果表明:玉米黄色素的最大吸收波长为448 nm,该色素不耐高温,日光照稳定性差；pH对玉米黄色素的稳定性无影响；除金属离子Fe3+、Al3+外,大多数金属离子对玉米黄色素无影响；低浓度糖、高浓度抗坏血酸对玉米黄色素有一定保护作用；而双氧水、苯甲酸钠、山梨酸钾对色素有明显的破坏作用.

Study on the Stability of Yellow Pigment from Maize Powder

The stability of yellow pigment from maize powder was investigated.The results showed that the maximum absorbance wavelength of the maize yellow pigment is 448 nm.The pigment did not tolerate high temperature and was instable to lights.pH had no effect on its stability.Most metal ions had no effects on the stability of pigment except that Al3+、Fe3+ had severe undesirable effect.The low concentration of sugar and the high concentration of ascorbic acid fortified the tone of pigment,while sodium sulfite,hydrogen peroxide and sodium benzoate obviously degraded the tone of pigment.