[Determination of flavone for Scutellaria baicalensis from different areas by HPLC].
OBJECTIVE
To describe the difference between native and nonative herbs by determining contents of seven kinds of flavone for twenty-five samples from seventeen areas.


METHODS
HPLC. Fluid phase: MEOH-H2O-CH3COOH(ICE) (41:59:0.2) and (50:50:0.2). Detection wavelength: 275.


RESULTS
The contents of baicalin are 6%-9%, wogenin are 2%-8%, baicalein are 0.1%-1.6%, neobaicalein are 0.01%-0.2%, wogonin are 0.01%-0.3%, visidulin and oroxylin are trace amounts or undetected.


CONCLUSIONS
The native and nonative herbs have no distinct differce in absolute component ratio. The ratio of baicalin and wogenin is under three. The ratio of baicalin and baicalein, baicalin and wogonin is between twenty and fifty.
Yang
Li-xin
LX
Institute of Chinese Materia Medica, China Academy of TCM, Beijing 100070, China.
Liu
Dai
D
Feng
Xue-feng
XF
Cui
Shu-lian
SL
Yang
Jing-yu
JY
Tang
Xiao-jun
XJ
He
Xi-rong
XR
Liu
Ju-fu
JF
Hu
Shi-lin
SL
D002851:Chromatography, High Pressure Liquid; D044950:Flavanones; D005419:Flavonoids / Q000032:analysis*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011786:Quality Control; D031364:Scutellaria baicalensis / Q000737:chemistry*
D044950:Flavanones; D005419:Flavonoids; C038044:baicalin; C006680:baicalein; C085514:wogonin