Objective:To study chemical components of Dangguibuxue decoction.Methods:The compounds were separated on a Hypersil-Hypurity C

18

（150 mm×2.1 mm

5 μm） analytical column.The column temperature was set at 40 ℃.Mobile phase consisted of methanol and water using a gradient elution.The flow rate was set at 0.2 mL·min

-1

.UV spectra were obtained by scanning from 200 nm to 370 nm.The APCI-MS spectra were obtained in the positive ion mode scanning from m/z 100 to 650.Results:The peaks were identified by comparing their UV spectra

their molecular weights and their retention behaviors with data reported in the literature.The ten components seem to be tentatively identified.Conclusions: Because of providing UV and molecular mass as well as retention time

LC-DAD-MS is a powerful tool for the chemical analysis of Traditional Chinese Medicines.