Objective: To investigate the content of magnolol in hejian decoction(mixed the traditional Chinese herbs together

then boiling them with water)and in fenjian decoction(boiling the single traditional Chinese herb with water separately

then mixed the abstracts)of Banxia Houputang(composed of Prunus Ephedra sinica armeniaca and Mangnolia officinalis). Method :A HPLC method was established with a Diamonisl C18 column(4.6 mm×200 mm

5 μm)

a mobile phase of methanol-water(78 ∶22)

a flow rate of 1 mL ·min-1 and a detection wavelength of 294 nm in order to determine the content of magnolol. Result: The average content of magnolol of the fenjian decoction was equal to that of the hejian decoction. Conclusion: Comparing with both decoctions

the content of magnolol in hejian and fenjian decoction was equal.