Simultaneous quantification of active components in the herbs and products of Si-Wu-Tang by high performance liquid chromatography-mass spectrometry.
Si-Wu-Tang (SWT), comprising Paeoniae, Angelicae, Chuanxiong and Rehmanniae, is one of the most popular Traditional Chinese Medicine (TCM) formulae for woman's health. Data mining from the available Chinese and English literatures indicated that the major bioactive components of SWT consist of paeoniflorin, paeonol, gallic acid, ferulic acid, Z-ligustilide, ligustrazine, butylphthalide, senkyunolide A and catalpol. Since content determination of the marker compounds is generally considered as an initial step for quality control of TCM product, a high performance liquid chromatography-mass spectrometric method employing both positive and negative electrospray ionization was developed for the simultaneous determination of the nine identified compounds in the raw herbs and products of SWT. The LOQ of the developed assay method for the tested components was 10ng/ml for ligustrazine, 200ng/ml for catalpol, and 100ng/ml for the other seven compounds. The intra-day and inter-day variations of the current assay were within 17.5%. Paeoniflorin, ferulic acid, gallic acid, Z-ligustilide and senkyunolide A were found in all SWT products investigated. Variations in the contents of the studied compounds were observed among batches of raw herbs and SWT products. The currently developed method provides a sensitive and rapid quantification approach that can be useful in the quality control of raw herbs and products of SWT.
Wang
Zhi-Jun
ZJ
School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
Wo
Siu-Kwan
SK
Wang
Ling
L
Lau
Clara B S
CB
Lee
Vincent H L
VH
Chow
Moses S S
MS
Zuo
Zhong
Z
D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D012015:Reference Standards; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization
D004365:Drugs, Chinese Herbal; C403258:si-wu-tang