Separation and quantitative analysis of coumarin compounds from Angelica dahurica (Fisch. ex Hoffm) Benth. et Hook. f by pressurized capillary electrochromatography
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- 作者：Yi Chen ; Guorong Fan ; Bin Chen ; Ying Xie ; Huiling Wu ; Yutian Wu ; Chao Yan and Jianmin Wang
- 关键词：Pressurized capillary electrochromatography ; Post-column detection cell ; Coumarin ; Angelica dahurica ; Chinese herb medicine
- 刊名：Journal of Pharmaceutical and Biomedical Analysis
- 出版年：2006
- 出版时间：11 April 2006
- 年：2006
- 卷：41
- 期：1
- 页码：105-116
- 全文大小：786 K
文摘
A pressurized capillary electrochromatography (pCEC) method with post-column detection cell has been developed for the therapeutically important coumarins from Angelica dahurica extract. The separation of five major coumarins (xanthotoxol, osthenol, imperatorin, oxypeucedanin hydrate, byakangelicin) was optimized with respect to composition of the mobile phase, ionic strength of buffers, pH, and applied voltage. Baseline separation was achieved for the five coumarins in less than 25 min using a mobile phase of methanol–acetonitrile–phosphate buffer (pH 4.8; 15 mM) (22.5:15:62.5, v/v/v). The method showed satisfactory retention time and peak area repeatability with the first use of post-column detection cell in the pCEC instrument. Comparing to capillary high performance liquid chromatography (capillary HPLC) and conventional high performance liquid chromatography (HPLC), higher column efficiency, and shorter analysis time were achieved in pCEC. The five coumarins in the extract samples representing different stages of traditional extraction of A. dahurica were also quantitatively analyzed by pCEC. The calibration curves were linear in the range 37–129, 36–126, 12–41, 88–306, 20–69 μg/ml of the standard solutions containing the five coumarins with correlation coefficients between 0.9976 and 0.9994.