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Determination of N-methyl-2-pyrrolidone and its metabolites in urine by micellar electrokinetic chromatography

  • Research Article
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Central European Journal of Chemistry

Abstract

A fast and accurate micellar electrokinetic capillary chromatography (MEKC) method was developed for monitoring N-methyl-2-pyrrolidone (NMP) exposure. Baseline separation of NMP and its main metabolites: 5-hydroxy-N-methyl-2-pyrrolidone (5HNMP), N-methylsuccinimide (MSI), 2-hydroxy-N-methylsuccinimide (2HMSI), and 2-pyrrolidone (2P) was obtained within 6 min in an uncoated fused silica capillary using 5 mM phosphate buffer and 140 mM sodium dodecyl sulfate (pH 7.1) as background electrolyte (BGE). On-line UV-detection was performed at 200 nm and the applied electric field was 400 V cm−1. Possible interference of BGE-induced system peaks on separation was investigated by computer simulation and no such interference was observed. The developed MEKC method combined with solid phase extraction for sample preparation was successfully applied to the analysis of urine of rats exposed to NMP. The urinary excretion was determined in 0–6 h and 6–24 h specimens collected after an intragastic administration of 308 mg NMP / kg rat body weight. The results of NMP disposition kinetics in rat urine are reported for NMP and metabolites.

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Authors and Affiliations

  1. Laboratory of Analytical Chemistry, Department of Chemistry, University of Helsinki, FI-00014, Helsinki, Finland

    Jana Lokajová & Susanne K. Wiedmer

  2. Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, CZ-128 43, Prague 2, Czech Republic

    Jana Lokajová

  3. Finnish Institute of Occupational Health, FI-00250, Helsinki, Finland

    Simo P. Porras

  4. the Finnish Institute of Occupational Health, Helsinki, Finland

    Eivor Elovaara

Authors
  1. Jana Lokajová
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  2. Simo P. Porras
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  3. Eivor Elovaara
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  4. Susanne K. Wiedmer
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Correspondence to Simo P. Porras.

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Lokajová, J., Porras, S.P., Elovaara, E. et al. Determination of N-methyl-2-pyrrolidone and its metabolites in urine by micellar electrokinetic chromatography. cent.eur.j.chem. 9, 825–833 (2011). https://doi.org/10.2478/s11532-011-0062-2

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  • DOI: https://doi.org/10.2478/s11532-011-0062-2

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