title: Voltammetric and amperometric determination of 2,4-dinitrophenol metabolites.
abstract: Methods for determination of 2-amino-4-nitrophenol and 4-amino-2-nitrophenol, metabolites of 2,4-dinitrophenol, were developed using differential pulse (DP) voltammetry and HPLC with amperometric and spectrophotometric detection. The applicability of these methods was tested by the determination of the analytes in model samples of urine after preliminary separation by solid-phase extraction. Voltammetry enabled parallel determination of both analytes, but its application in real matrix was severely limited due to the interference of other compounds present in urine. HPLC allowed the determination in real urine matrix down to micromolar concentrations; amperometric detection proved to be more sensitive and selective than the spectrophotometric one.
authors.affiliation: Charles University in Prague, Faculty of Science, Department of Analytical Chemistry, UNESCO Laboratory of Environmental Electrochemistry, Albertov 6, CZ-12843 Prague 2, Czech Republic. dejmkova@natur.cuni.cz
authors.forename: Hana
authors.initials: H
authors.lastname: Dejmkova
authors.forename: Anca-Iulia
authors.initials: AI
authors.lastname: Stoica
authors.forename: Jiri
authors.initials: J
authors.lastname: Barek
authors.forename: Jiri
authors.initials: J
authors.lastname: Zima
mesh_terms: D019297:2,4-Dinitrophenol / Q000032:analysis / Q000378:metabolism* / Q000652:urine; D002851:Chromatography, High Pressure Liquid; D004563:Electrochemistry / Q000379:methods*; D052616:Solid Phase Extraction
chemical_list: D019297:2,4-Dinitrophenol