High-Performance Liquid Chromatography Linked to Inductively Coupled Plasma Mass Spectrometry and Orthogonal Acceleration Time-of-Flight Mass Spectrometry for the Simultaneous Detection and Identification of Metabolites of 2-Bromo-4- trifluoromethyl-[13C]-acetanilide in Rat Urine
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Abstract
The use of HPLC coupled to inductively coupled plasma mass spectrometry (ICPMS) and orthogonal acceleration time-of-flight (oa-TOF) for the profiling, identification, and quantification of metabolites in rat urine following the administration of 2-bromo-4-trifluoromethylacetanilide is described. The metabolites present in the sample were separated by reversed-phase gradient chromatography with UV-diode array detection. The bulk of the eluent (90%) from the UV detector was directed to an ICPMS where bromine-containing metabolites were detected and quantified using ICPMS. The minor portion of the eluent (10%) was taken for oa-TOFMS for identification. By these means, the metabolites were identified as sulfate and glucuronide conjugates of a ring hydroxy-substituted metabolite, a N-sulfate, a N-hydroxylamine glucuronide, and N- and N-hydroxyglucuronides.
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