Verapamil quantification in human plasma by liquid chromatography coupled to tandem mass spectrometry: An application for bioequivalence study

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• 作者：Ney Carter do C. Borges ; Gustavo D. Mendes ; Rafael E. Barrientos-Astigarraga ; Paulo Galvinas ; Celso H. Oliveira and Gilberto De Nucci
• 关键词：Verapamil ; Bioequivalence ; LC– ; MS/MS ; Metoprolol
• 刊名：Journal of Chromatography B, Analytical Technologies in the Biomedical and Life Sciences
• 出版年：2005
• 出版时间：2005
• 年：2005
• 卷：827
• 期：2
• 页码：165-172
• 全文大小：481 K

文摘

An analytical method based on liquid chromatography with positive ion electrospray ionization (ESI) coupled to tandem mass spectrometry detection (LC–MS/MS) was developed for the determination of Verapamil in human plasma using Metoprolol as the internal standard. The analyte and internal standard were extracted from the plasma samples by liquid–liquid extraction and chromatographed on a C₈ analytical column. The mobile phase consisted of methanol–water (70:30; v/v) + 12 mM formic acid. The method had a chromatographic total run time of 3.5 min and was linear within the range 1.00–500 ng/mL. Detection was carried out on a Micromass Quattro Ultima tandem mass spectrometer by multiple reaction monitoring (MRM). The intra-run imprecision was less than 5.1 % calculated from the quality control (QC) samples, and 16.3 % from the limit of quantification (LOQ). The accuracy determined from QC samples were between 92.9 and 103.1 % , and 95.2 and 115.3 % from LOQ. Concerning the inter-batch analysis, the imprecision was less than 5.8 % and 17.3 % from QC samples and LOQ, respectively. The accuracy varied between 98.2 and 100.8 % from QC and it was 103.1 % from LOQ. The protocol herein described was employed in a bioequivalence study of two tablet formulations of Verapamil.