Please use this identifier to cite or link to this item:
標題: Quality control of Chinese medicinal preparations LC/ESI(+)/MS/MS analyses of saikosaponins-a and -c as markers of Bupleuri radix samples
作者: Liau, B.C.
Hsiao, S.S.
Lee, M.R.
Jong, T.T.
Chiang, S.T.
關鍵字: Bupleuri radixes;Chaihu;saikosaponin-a;saikosaponin-c;LC/ESI(+)/MS/MS;mass-spectrometry;chromatography;saponins
Project: Journal of Pharmaceutical and Biomedical Analysis
期刊/報告no:: Journal of Pharmaceutical and Biomedical Analysis, Volume 43, Issue 3, Page(s) 1174-1178.
We have used LC/ion trap tandem MS analysis to determine saikosaponin-a and -c as target markers in crude 70% methanol extracts from three different species of Bupleuri radix and the 10 most-popular Chinese medicinal preparations containing "Chaihu" (B. radix) without any clean-up. The optimal ionization characteristics were obtained when using positive-ion electrospray ionization (ESI) with 50 mu M sodium acetate as an additive in the mobile phase. We observed good linearity over the range from 0.02 to 2 mu g/ml for saikosaponin-a and from 0.02 to 1 mu g/ml for saikosaponin-c. The intra-day precisions varied between 3.3 and 8.8% for saikosaponin-a and 0.3 and 11.1% for saikosaponin-c. The limits of detection were 0.01 mu g/ml for both markers. The recoveries of saikosaponin-a and -c from the extract of a medicinal preparation sample (Chai-Hu-Ching-Gan-Tang, No. 13 in the table of section Analysis on actual samples) were 97 and 100%, respectively, at a 1 mu g/ml spiking concentration of each marker. The highest concentrations of saikosaponin-a and -c among the three B. radixes were found in B. kaoi Liu Chao & Chuang (10.1 mg/g) and in B. falcatum (3.4 mg/g), respectively. The amounts of these saikosaponins in the 10 Chinese medicinal preparations ranged between 0.11 and 1.22 mg/g for saikosaponin-a and between 0.01 and 0.33 mg/g for saikosaponin-c. (c) 2006 Elsevier B.V. All rights reserved.
ISSN: 0731-7085
DOI: 10.1016/j.jpba.2006.10.002
Appears in Collections:化學系所

Show full item record

Google ScholarTM




Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.