Automated solid-phase extraction method for the determination of atovaquone in capillary blood applied onto sampling paper by rapid high-performance liquid chromatography.
A bioanalytical method for the determination of atovaquone in 100 microl blood-spots by solid-phase extraction and high-performance liquid chromatography has been developed and validated. Atovaquone was extracted from the sampling paper in 0.2 M phosphoric acid and a structurally similar internal standard was added with acetonitrile before being loaded onto a C8 end-capped solid-phase extraction column. Atovaquone and internal standard were analysed by high-performance liquid chromatography on a C18 J'Sphere ODS-M80 (150 x 4.0 mm) column with mobile phase acetonitrile-phosphate buffer, 0.01 M, pH 7.0 (65:35, v/v) and UV detection at 277 nm. The intra-assay precision was 2.7% at 12.00 microM and 13.5% at 1.00 microM. The inter-assay precision was 3.3% at 12.00 microM and 15.6% at 1.00 microM. The lower limit of quantification was 1.00 microM. The limit of detection was 0.50 microM.
Lindegårth
N
N
Dalarna University College, Borlänge, Sweden.
Funding
L
L
Bergqvist
Y
Y
D000935:Antifungal Agents / Q000097:blood*; D000962:Antimalarials / Q000097:blood*; D053626:Atovaquone; D001331:Automation; D002196:Capillaries; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D009285:Naphthoquinones / Q000097:blood*; D012015:Reference Standards; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D000935:Antifungal Agents; D000962:Antimalarials; D009285:Naphthoquinones; D053626:Atovaquone