Publication: Determination of artemether and its major metabolite, dihydroartemisinin, in plasma using high-performance liquid chromatography with electrochemical detection
Issued Date
1997-03-07
Resource Type
ISSN
15726495
Other identifier(s)
2-s2.0-0030959453
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Chromatography B: Biomedical Applications. Vol.690, No.1-2 (1997), 259-265
Suggested Citation
J. Karbwang, K. Na-Bangchang, P. Molunto, V. Banmairuroi, K. Congpuong Determination of artemether and its major metabolite, dihydroartemisinin, in plasma using high-performance liquid chromatography with electrochemical detection. Journal of Chromatography B: Biomedical Applications. Vol.690, No.1-2 (1997), 259-265. doi:10.1016/S0378-4347(96)00422-7 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/17935
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Determination of artemether and its major metabolite, dihydroartemisinin, in plasma using high-performance liquid chromatography with electrochemical detection
Other Contributor(s)
Abstract
A rapid, selective, sensitive and reproducible HPLC with reductive electrochemical detection for quantitative determination of artemether (ART) and its plasma metabolite, dihydroartemisinin (DHA: α and β isomers) in plasma is described. The procedure involved the extraction of ART, DHA and the intemal standard, artemisinin (ARN) with dichloromethane-tert.-methylbutyl ether (1:1, v/v) or n-butyl chloride-ethyl acetate (9:1, v/v). Chromatographic separation was performed with a mobile phase of acetonitrile-water (20:80, v/v) containing 0.1 M acetic acid pH 5.0, running through a μBondapak CN column. The method was capable of separating the two isomeric forms of DHA (α, β). The retention times of α-DHA, β-DKA, ARN and ART were 4.6, 5.9, 7.9 and 9.6 min, respectively. Validation of the assay method was performed using bath extraction systems. The two extraction systems produced comparable recoveries of the various analytes. The average recoveries of ART, DHA and ARN over the concentration range 80-640 ng/ml were 86-93%. The coefficients of variation were below 10% for all three drugs (ART, α-DHA, ARN). The minimum detectable concentrations for ART and α-DHA in spiked plasma samples were 5 and 3 ng/ml, respectively. The method was found to be suitable for use in clinical pharmacokinetic study.