Abstract: This paper mainly studied the way of extraction and purifying the yellow pigment in Dioscorea zingibe rensis,and the effects of light, heat, metalions and pH value to Dioscorea zingibe rensis pigment. The e xperimental results showed it has stronger absorption peaks in the ultraviolet range. The Dioscorea zingibe rensis pigment possesses higher stability of light and heat. Yellowness of Dioscorea zingiberensis pigment was increased in the presence of Fe³⁺, Cu²⁺,Hg²⁺ ions.

Key words: Dioscorea zingiberensis pigment, extraction, stability