Identification of flavonoids in plants by HPLC

The HPLC capacity factors of 27 flavonoids were determined using the following chromatographic conditions: Zorbax SB 250 × 4.6 mm analytical columns containing C-18, C-8, and CN sorbents with particle size 5 μm, mobile phase consisting of 0.01 M potassium dihydrogen phosphate pH 3.0 and acetonitrile at a ratio of 80:20 (v/v), column temperature 30°C; absorption spectra were recorded over the range 190 – 400 nm. This chromatography system can be used for preliminary identification of flavonoids in plant materials.