Determination of artemether and its metabolite, dihydroartemisinin, in plasma by high-performance liquid chromatography and electrochemical detection in the reductive mode
| Autor: | M. Donker, C. F. M. Van Valkenburg, C. Netter, J. Godbillon, N. Sandrenan, Antoine Sioufi |
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| Rok vydání: | 1997 |
| Předmět: |
Quality Control
Analyte Acetonitriles medicine.medical_treatment Metabolite Dihydroartemisinin Acetates Sensitivity and Specificity High-performance liquid chromatography Antimalarials chemistry.chemical_compound Drug Stability Blood plasma medicine Humans Chromatography High Pressure Liquid Detection limit Autoanalysis Chromatography Chemistry General Chemistry Artemisinins Solvent Artemether Sesquiterpenes Quantitative analysis (chemistry) |
| Zdroj: | Journal of Chromatography B: Biomedical Sciences and Applications. 691:145-153 |
| ISSN: | 0378-4347 |
| DOI: | 10.1016/s0378-4347(96)00431-8 |
| Popis: | An analytical method for the determination of artemether (A) and its metabolite dihydroartemisinin (DHA) in human plasma has been developed and validated. The method is based on high-performance liquid chromatography (HPLC) and electrochemical detection in the reductive mode. A, DHA and artemisinin, the internal standard (I.S.), were extracted from plasma (1 ml) with 1-chlorobutane-isooctane (55:45, v/v). The solvent was transferred, evaporated to dryness under nitrogen and the residue dissolved in 600 microliters of water-ethyl alcohol (50:50, v/v). Chromatography was performed on a Nova-Pak CN, 4 microns analytical column (150 mm x 3.9 mm I.D.) at 35 degrees C. The mobile phase consisted of pH 5 acetate-acetonitrile (85:15, v/v) at a flow-rate of 1 ml/min. The analytes were detected by electrochemical detection in the reductive mode at a potential of -1.0 V. Intra-day accuracy and precision were assessed from the relative recoveries (found concentration in % of the nominal value) of spiked samples analysed on the same day (concentration range 10.9 to 202 ng/ml of A and 11.2 to 206 ng/ml of DHA in plasma). The mean recoveries over the entire concentration range were from 96 to 100% for A with C.V. from 6 to 13%, from 92% to 100% for DHA (alpha-tautomer) with C.V. from 4 to 16%. For A, the mean recovery was 96% at the limit of quantitation (LOQ) of 10.9 ng/ml with a C.V. of 13%. For DHA, the mean recovery was 100% at the LOQ of 11.2 ng/ml with a C.V. of 16%. |
| Databáze: | OpenAIRE |
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