Abstract: Oleanolic acid was important bioactive components in mung bean, red bean, lotus seed and jujube. The contents of these compounds in food were determined by reversed-phase high performance liquid chromatography. Nucleodur C18 column (250mm×4.6mmi.d., 5μm)was used with ethanol-water (80:20) as the mobile phase. The good linear relationships were obtained under the optimum conditions for each component. The recoveries of the standards added were 96.7%～101.5%, while the relatively standard deviations were within the range of 0.64%～2.89%.

Key words: high performance liquid chromatography, oleanolic acid, food, mung bean, red bean, lotus seed, jujube