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Direct monitoring of Exogenous γ-Hydroxybutyric Acid in body fluids by NMR spectroscopy

Research output: Contribution to journalArticlepeer-review

Martina Palomino-Schätzlein, Yaoyao Wang, Teodor Parella, Alan D. Brailsford, David A. Cowan, Cristina Legido-Quigley, Míriam Pérez-Trujillo

Original languageEnglish
Pages (from-to)8343-8350
Number of pages8
JournalAnalytical Chemistry
Issue number16
Early online date17 Jul 2017
Accepted/In press17 Jul 2017
E-pub ahead of print17 Jul 2017
Published15 Aug 2017


King's Authors


γ-Hydroxybutyric acid (GHB) is a popular drug increasingly associated to cases of drug-facilitated sexual assault (DFSA). Currently, expanding procedures of analysis and having forensic evidence of GHB intake at a long term are mandatory. Up to now, most studies have been performed using GC-MS and LC-MS as analytical platforms, which involve significant manipulation of the sample and, often, indirect measurements. In this work, procedures used in NMR-based metabolomics were applied to a GHB clinical trial on urine and serum. Detection, identification and quantification of the drug by NMR methods were surveyed, as well as the use of NMR-based metabolomics for the search of potential surrogate biomarkers of GHB consumption. Results demonstrated the suitability of NMR spectroscopy, as a robust nondestructive technique, to monitor (detect, identify and quantify) fast and directly exogenous GHB in almost intact body fluids, and its high potential in the search for metabolites associated to GHB intake.

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