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• W2031633023 abstract "Because GHB (gamma-hydroxybutyrate) is present in both blood and urine of the general population, toxicologists must be able to discriminate between endogenous levels and a concentration resulting from exposure. In this paper, we propose a procedure for the detection of exogenous GHB in blood by gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS). Following liquid-liquid and solid-phase extractions, GHB is derivatized to GHB di-TMS before analysis by GC-C-IRMS. Significant differences in the carbon isotopic ratio (delta(13)C-values > 13.5 per thousand) were found between endogenous and synthetic GHB. Indeed, for postmortem blood samples with different GHB concentrations (range: 13.8-86.3 mg/L), we have obtained GHB delta(13)C-values ranging from -20.6 to -24.7 per thousand, whereas delta(13)C-values for the GHB from police seizure were in the range -38.2 to -50.2 per thousand. In contrast to the use of cut-off concentrations for positive postmortem blood GHB concentrations, this method should provide an unambiguous indication of the drug origin." @default.
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• W2031633023 date "2005-11-01" @default.
• W2031633023 modified "2023-10-09" @default.
• W2031633023 title "Detection of Exogenous GHB in Blood by Gas Chromatography-Combustion-Isotope Ratio Mass Spectrometry: Implications in Postmortem Toxicology" @default.
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• W2031633023 doi "https://doi.org/10.1093/jat/29.8.777" @default.
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