[Study on fingerprint of Cortex Fraxini with HPLC].
OBJECTIVE
To establish fingerprint of Cortex Fraxini and provide reference for quality evaluation of Cortex Fraxini.


METHODS
Chromatographic experiments were performed on Agilent Extend C18 column (4.6 mm x 250 mm, 5 microm), eluted with methanol and water, containing 0.4% acetic acid as the mobile phases in gradient elution. The detection wavelength was 0-60 min, 340 nm; 6-74 min, 254 nm; 74-75 min, 340 nm, and the flow rate was 1.0 mL x min(-1). Forty samples in four varieties of Cortex Fraxini were detected to establish fingerprints, respectively.


RESULTS
Every parameter of the method validation complied with related rules and regulations. There were 15 common peaks in the fingerprint of 10 Fraxinus rhynchophylla samples, eleven common peaks in the fingerprint of 10 F. chinensis var. acuminata. samples, and in the fingerprint of 10 F. chinensis samples. Nineteen common peaks in the fingerprint of 10 F. stylosa samples. There were 5 common peaks in the fingerprints of 40 Cortex Fraxini samples. The similarity factors of the 10 samples of every species were all more than 0.96 compared with the control fingerprint. The similarity of the 40 Cortex Fraxini samples was more than 0.90. Four effective constituents and one unknown constituent were found in 40 samples.


CONCLUSIONS
The fingerprints of F. rhynchophylla bark, F. chinensis bark, F. chinensis var. acuminata bark, F. stylosa bark and Cortex Fraxini were established. The methodological evaluation showed that the results were in accord with the technology requirements of chromatography fingerprint, and it laid a good foundation for quality control of Cortex Fraxini.
Liu
Li-Mei
LM
Basic Theory Research Institute of Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing 100700, China. liulimeihrb@sina.com
Chen
Lin
L
Wang
Rui-Hai
RH
Yang
Qing
Q
Weng
Xiao-Gang
XG
Wang
Li
L
D031319:Aesculus; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*
D004365:Drugs, Chinese Herbal; C517354:horse chestnut seed