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Determination of selected β-receptor antagonists in biological samples by solid-phase extraction with cholesterolic phase and LC/MS

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Abstract

A new method is presented for the determination of five selected β-receptor antagonists by HPLC, which emphasizes sample preparation via retention on a new type of silica gel sorbent used for solid-phase extraction (SPE). Sorbents of this type were obtained by the chemical modification of silica gels of various porosities by cholesterol ligands. The cholesterol-based packing material was investigated by spectroscopic methods and elemental analysis. The recoveries obtained with the extraction procedure were optimum over a relatively broad sample pH range (3.08–7.50). Analytical factors such as the sample loading, the washing step and elution conditions, the concentration of β-receptor antagonists to be extracted, and the type of sorbent were found to play significant roles in the sample preparation procedure and would therefore need to be controlled to achieve optimum recoveries of the analytes. Under optimum conditions, the recoveries of nadolol, acebutolol, esmolol, oxprenolol and propranolol from spiked buffers, blood and urine were reproducible and dependent on the polarity or hydrophilicity of the compounds. The above analytes were determined by reverse-phase high-performance liquid chromatography (HPLC) with UV and ESI-ion trap mass spectrometry (MS) detection. The described method was found to be suitable for the routine measurement of compounds that are both polar and basic, and can be applied for the analysis of biological samples such as urine and blood in clinical, toxicological or forensic laboratories. The recovery measurements were performed on spiked human urine and serum, and on real samples of mouse blood serum.

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Authors and Affiliations

  1. Department of Environmental Chemistry and Ecoanalytics, Faculty of Chemistry, Nicolas Copernicus University, Gagarin Street 7, 87–100, Toruń, Poland

    Bogusław Buszewski & Tomasz Welerowicz

  2. Department of Animal Toxicology, Faculty of Biology, Nicolas Copernicus University, Gagarin Street 9, 87–100, Toruń, Poland

    Eugenia Tęgowska

  3. Department of Pharmacology in Zabrze, Silesian Medical University, Jordana Street 19, 41–808, Zabrze, Poland

    Tadeusz F. Krzemiński

Authors
  1. Bogusław Buszewski
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  2. Tomasz Welerowicz
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  3. Eugenia Tęgowska
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  4. Tadeusz F. Krzemiński
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Correspondence to Bogusław Buszewski.

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Buszewski, B., Welerowicz, T., Tęgowska, E. et al. Determination of selected β-receptor antagonists in biological samples by solid-phase extraction with cholesterolic phase and LC/MS. Anal Bioanal Chem 393, 263–272 (2009). https://doi.org/10.1007/s00216-008-2369-1

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  • DOI: https://doi.org/10.1007/s00216-008-2369-1

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