title: Reversed-phase liquid chromatographic method with fluorescence detection for the simultaneous determination of albendazole sulphoxide, albendazole sulphone and albendazole 2-aminosulphone in sheep plasma.
abstract: A rapid and sensitive HPLC method for the simultaneous quantification of albendazole sulphoxide (ABZ-SO), albendazole sulphone (ABZ-SO2) and albendazole 2-aminosulphone (ABZ-SO2NH2) in sheep blood plasma has been developed. Plasma samples were extracted with ethyl acetate under alkaline conditions. Separation was achieved on a C18 reversed-phase analytical column, in the presence of positively- (tetra-n-butylammonium hydrogen sulphate) and negatively-charged (octanesulphonate sodium) pairing ions, while detection was performed fluorometrically. Excitation and emission wavelengths were 290 and 320 nm, respectively. Limits of quantification were defined at 39 ng/ml for ABZ-SO, 4.95 ng/ml for ABZ-SO2 and 4 ng/ml for ABZ-SO2NH2. Accuracy data, in terms of recovery efficiency showed overall values (+/- S.E.M.) of 85.6 +/- 1.0% for ABZ-SO, 100.0 +/- 1.0% for ABZ-SO2 and 89.1 +/- 0.6% for ABZ-SO2NH2. The method was successfully applied to quantitatively determine the three albendazole metabolites in plasma samples collected from sheep that had been orally administered albendazole.
authors.affiliation: Laboratory of Veterinary Pharmacology, School of Veterinary Medicine, Aristotle University of Thessaloniki, GR-54 124, Greece. batzias@vet.auth.gr
authors.forename: Georgios C
authors.initials: GC
authors.lastname: Batzias
authors.forename: Georgios A
authors.initials: GA
authors.lastname: Delis
mesh_terms: D015766:Albendazole / Q000031:analogs & derivatives* / Q000097:blood*; D000818:Animals; D000871:Anthelmintics / Q000097:blood*; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D012680:Sensitivity and Specificity; D012756:Sheep; D013050:Spectrometry, Fluorescence / Q000379:methods*
chemical_list: D000871:Anthelmintics; C027187:albendazole sulfone; C085926:albendazole-2-aminosulfone; D015766:Albendazole; C027186:albendazole sulfoxide