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.