A Rapid and Sensitive LC–MS/MS Assay for the Quantitation of Bromantane in Human Plasma

Abstract

The purpose of this study was to develop and validate a high-performance liquid chromatographic-tandem mass spectrometric (LC-MS/MS) method for analysis of the bromantane in human plasma. The analyte and Internal Standard (IS), selenox, were extracted from human plasma by solid-phase extraction and separated on a Zorbax SB-C18 column using methanol-0.2% formic acid as mobile phase. Detection was performed using an atmospheric pressure chemical ionization source and mass spectrometric positive Multi-Reaction-Monitoring-Mode (+MRM) at an ion voltage of +2000 V. The assay was linear over the concentration range 1-500 ng/mL with the Lowest Limit of Quantification (LLOQ) of 1 ng/mL. The method also afforded satisfactory results in terms of the sensitivity, specificity, precision (intra-and inter-day, CV<10%), accuracy, recovery as well as the stability of the analyte under various conditions. The method can be applied to pharmacokinetic and toxicological studies.