Objective To analyze the content of 5 types of flavonoid in 30 kinds of vegetable sold in Beijing.Method The content of quercetin,kaempferol,myricetin,luteolin and apigenin were determined with high-performance liquid chromatography. Vegetables were sampled from food markets in Beijing.Results Quercetin was detected in all 30 kinds of fresh vegetable,ranging from 2.1 to 85.9 mg/100 g ;myricetin was detected in 9 kinds of vegetable,apigenin in 8 kinds of vegetable and luteolin in 8 kinds of vegetable,but kae...