Analysis of the Content of Ursolic Acid in the Fruit of Chinese Jujube with the Method of HPLC

[Objective] The distribution of the content of the ursolic acid in the fruit of Chinese jujube was explored through the analysis.[Method] The ursolic acid in the fruits of 53 Chinese jujube cultivars was extracted with ultrasonic method and its content in the fruit of each cultivar was tested with HPLC.[Results] The results showed that the ursolic acid was widely distributed in different Chinese jujube cultivars and its content in the fruit varied from 7.75 μg/g to 420.10 μg/g,with average content of 164.79 μg/g.The highest level of ursolic acid was found in the cultivar-Yucituanzao,which was 420.10 μg/g.And the content of ursolic acid was concentrated in the range of 100-200 μg/g and its highest value of average content was in fresh fruit of Chinese jujube,which was 109.61 μg/g.[Conclusion] The scientific basis of the development and utilization of the fruit of Chinese jujube as functioned food and the quality control of its product was provided.