Studies on Extraction and Stability of Pigment from Chrysanthenum koraiense

The yellow pigment of Chrysanthemum koraiense was extracted through different soluvents such as methanol,alcohol,acetone,petroleum ether,chloroform,benzene and water.Besides,we detected by the 721 spectrophotometer the stability of the yellow pigment for different pH values,different soluvents and different illumination.The results showed that for different pH values the pigment extracted from water solution is always yellow.Its stability in sodium chloride or sucrose for different temperatures is better with the lowest residual ratio of pigment up to 91.18%.The studies also indicate that the pigment can be decomposed and faded through stronger light,but its residual ratio is still 89.67%,even if it is exposed to light indoors for 5 hours.We can conclude that the flower's yellow pigment of Chrysanthemum koraiense can be used for colour agent in food and drink after artifical extraction.