title: Development and optimization of a reversed-phase high-performance liquid chromatographic method for the determination of acetaminophen and its major metabolites in rabbit plasma and urine after a toxic dose.
abstract: A reversed-phase high-performance liquid chromatographic method with detection at 242 nm was developed, optimized and validated for the determination of acetaminophen (A) and its major metabolites glucuronide (AG) and sulfate (AS) conjugates in rabbit plasma and urine after a toxic dose. m-Aminophenol was used as internal standard (IS). A Hypersil BDS RP-C18 column (250 x 4.6 mm), 5 microm particle size, was equilibrated with a mobile phase composed of aqueous buffer solution of KH2PO4 0.05 M containing 1% CH3COOH (pH 6.5) and methanol (95:5, v/v). Its flow rate was 1.5 ml/min. Calibration curves of A, AG and AS were linear in the concentration ranges of 0.5-250, 1-200, 0.5-100 microg/ml in plasma and 1-200, 0.5-150, 0.5-100 microg/ml in urine matrix, respectively. Limits of detection and quantitation were calculated in all cases and extensive recovery studies were also performed. Intra-day relative standard deviation (R.S.D.) for A, AG and AS in plasma was less than 5, 4, 2% and in urine less than 4, 7, 4%, respectively, while the corresponding inter-day values were 7, 6, 4% and 5, 8, 6%, respectively.
authors.affiliation: Department of Chemistry, University of Athens, Panepistimiopolis, Greece.
authors.forename: M V
authors.initials: MV
authors.lastname: Vertzoni
authors.forename: H A
authors.initials: HA
authors.lastname: Archontaki
authors.forename: P
authors.initials: P
authors.lastname: Galanopoulou
mesh_terms: D000082:Acetaminophen / Q000032:analysis* / Q000493:pharmacokinetics / Q000506:poisoning; D018712:Analgesics, Non-Narcotic / Q000032:analysis* / Q000493:pharmacokinetics / Q000506:poisoning; D000818:Animals; D001711:Biotransformation; D002138:Calibration; D002492:Central Nervous System Depressants / Q000633:toxicity; D056486:Chemical and Drug Induced Liver Injury / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D000431:Ethanol / Q000633:toxicity; D007202:Indicators and Reagents; D011817:Rabbits; D012015:Reference Standards; D015203:Reproducibility of Results; D012996:Solutions
chemical_list: D018712:Analgesics, Non-Narcotic; D002492:Central Nervous System Depressants; D007202:Indicators and Reagents; D012996:Solutions; D000082:Acetaminophen; D000431:Ethanol