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Enantioselective analysis of unbound tramadol, O-desmethyltramadol and N-desmethyltramadol in plasma by ultrafiltration and LC-MS/MS: application to clinical pharmacokinetics.
de Moraes NV, Lauretti GR, Napolitano MN, Santos NR, Godoy AL, Lanchote VL. de Moraes NV, et al. J Chromatogr B Analyt Technol Biomed Life Sci. 2012 Jan 1;880(1):140-7. doi: 10.1016/j.jchromb.2011.11.033. Epub 2011 Nov 28. J Chromatogr B Analyt Technol Biomed Life Sci. 2012. PMID: 22173007
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