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Reference type: Journal
Authors: Santos MG, Tavares IMC, Boralli VB, Figueiredo EC
Article Title: Direct doping analysis of beta-blocker drugs from urinary samples by on-line molecularly imprinted solid-phase extraction coupled to liquid chromatography/mass spectrometry.
Publication date: 2015
Journal: Analyst
Volume: 140
Issue: (8)
Page numbers: 2696-2703.
DOI: 10.1039/C4AN02066A

Abstract: The use of beta-blockers to enhance performance in some sports is forbidden. Based on this regulation, there is a demand for dynamic analytical procedures for analyzing these compounds quickly and without manual sample preparation. Therefore, the use of a molecularly imprinted polymer (MIP) in a multidimensional liquid chromatographic system coupled to a mass spectrometer provides a good alternative for improving the selectivity and practicality of the beta-blocker analyses, as described in this paper. A water-compatible MIP for oxprenolol was synthesized by the precipitation method, using methacrylic acid as a functional monomer and 2-hydroxyethyl methacrylate and glycerol dimethacrylate as hydrophilic monomers. A column filled with MIP was coupled to an LC-MS/MS instrument under the multidimensional configuration, with 10.0 mmol L-1 ammonium formate buffer (pH 5.0) as the loading and reconditioning mobile phase and a 0.01% formic acid aqueous solution-methanol (30 : 70 v : v) as the elution mobile phase. The system was used for on-line extraction and quantization of oxprenolol (from 1.0 to 75.0 μg L-1), atenolol, propranolol, nadolol, pindolol, labetalol and metoprolol (all from 3.0 to 50 μg L-1) simultaneously, from urine samples. The correlation coefficient was higher than 0.99 for all the analytes. Suitable precision and accuracy were obtained
Template and target information: β-blockers, oxprenolol, atenolol, propranolol, nadolol, pindolol, labetalol, metoprolol

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