Abstract: In ordor to use the peel of orange fully for maximum economic profits,the alkali-extraction and acid-precipitation method for extraction and the D-101 macroporous resin for purification of hesperidin from orange peels were used and the stability of hesperidin was investigated under conditions such as different temperature,time,oxygen, light,pH,metal ion,et al. The results showed that the content of hesperidin extracted by this method was 96.7%(HPLC), the extraction rate was 1.92%.Its solution was stable in the conditions as following: below 75℃, within 30 min,oxygenless, lightproof and acidic or neutral environment, whereas hesperidin would be oxidated to result in the molecular structure change if Fe³⁺,Cu²⁺ exisied,and in the condition with rich oxygen and light,especially strong light.

Key words: Citrus reticulate Blanco, hesperidin, stability