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[Determination of flavonoids in pollen typhae(Puhuang) by HPCE and HPLC]
1Hunan Academy of Traditional Chinese Medicine and Materia Medica, Changsha 410006.
Objective:
To determine two flavonoids isorhamnetin-3-O-neohesperidoside(I) and typheneoside(II) in Pollen Typhae by HPCE and HPLC.
Method:
HPCE conditions: buffer = 0.02 mol.L-1 borate, 0.05 mol.L-1 SDS and 10% acetonitrile; V = 20 kV; T = 30 degrees C; lambda = 270 nm; sample size = 30 kPa.s, HPLC conditions: C18 lumn, acetonitrile-water (15:85) as mobile phase detection wavelength at 254 nm.
Result:
The contents of flavonoids I and II in five different Typha species and eighteen commercial samples of traditional Chinese drug Puhuang were between 0.1%-0.6%.
Conclusion:
These two methods are rapid, simple, accurate and can be used for the quality control of this traditional Chinese drug.