[Investigation on computative spectrophotometry employed in the assay of peaonol in cortex moutan].
OBJECTIVE
To investigate the easibility of employed computative spectrophotometry in the assay of traditional Chinese medicines.


METHODS
Make contents of peaonol in 10 samples of Cortex Moutan were determined by three-wavelength spectrophotometry and dual wavelength K-ratio spectrophotometry, and then compared with the method in Chinese Pharmacopeia.


RESULTS
The differences of the UV spectrum of different lots of samples bring about relative error. sometimes up to 10%-30% for computative spectrophotometry.


CONCLUSIONS
Computative spectrophotometry should be used carefully in assaying traditional Chinese medicines.
Rao
W
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Guangxi Wuzhou Prefectural Institute for Drug Control, Wuzhou 543001.
D000098:Acetophenones / Q000032:analysis*; D004365:Drugs, Chinese Herbal; D019684:Magnoliopsida; D010946:Plants, Medicinal; D013056:Spectrophotometry, Ultraviolet / Q000379:methods
D000098:Acetophenones; D004365:Drugs, Chinese Herbal; C013638:paeonol