The Stability of Red Pigment from Ixora Chinensis Lam

Objective: To provide important raw material for all kinds of new pigment used in food products,cosmetic and leechdom etc.Study on the stability of red pigment from Ixora chinensis Lam and the condition of extraction.Ethanol was used as the extractant in the extraction,and the pigment stability was investigated by UVspectrum.Methods:The optimum condition for ethanol extraction is: distilled water was used as the extractant and it was extracted under room temperature for 24 h.Conclusion :The lmax for the pigment was 380 nm,which has good solubility in water,and excellent stability in the extractant(pH 1～9) for wide temperature scope,bad light resistanc characteritics was observed,however.Some common food additive,oxidizing agent,reducing agent have effect on the stability of the pigment,metallic ions has no effect on its stability.