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Separation and quantitative analysis of coumarin compounds fromAngelica dahurica(Fisch. ex Hoffm)Benth. et Hook. fby pressurized capillary electrochromatography

Authors
Journal
Journal of Pharmaceutical and Biomedical Analysis
0731-7085
Publisher
Elsevier
Publication Date
Volume
41
Issue
1
Identifiers
DOI: 10.1016/j.jpba.2005.10.033
Keywords
  • Pressurized Capillary Electrochromatography
  • Post-Column Detection Cell
  • Coumarin
  • Angelica Dahurica
  • Chinese Herb Medicine
Disciplines
  • Medicine

Abstract

Abstract 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.

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