Abstract:

Crushed“ Red Sun”kiwifrnit was treated with pectinase for 2 to 4 h at 50℃, and then centrifugalized and filtrated. The filtrate containing pigment was collected to investigate the physico-chemical properties and stability of pigment of“Red Sun”kiwifruit. The results showed that the pigment is easy to be dissolved in water and acid and unstable to heat and light, and has good resistance against ultraviolet light. It was also found that Mg2+ has positive effect on the color of pigment, but Pb2+ has negative effect, and other metal ions have no significant effects. Under acid condition, the pigment has resistance against reducer H2SO3, whereas preservative, such as potassium sorbate has no significant effect on its stability.

Key words: pigment of“Red Sun&rdquo, kiwifruit, physico-chemical property, stability