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Screening and confirmation methods for GHB determination in biological fluids.

Ann-Sofie M E Ingels1, Sarah M R Wille, Nele Samyn

  • 1Laboratory of Toxicology, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, 9000, Ghent, Belgium.

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|February 7, 2014
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Summary

This review details methods for detecting gamma-hydroxybutyric acid (GHB), a drug of abuse, in biological samples. It covers screening and confirmation techniques, addressing challenges like GHB

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Area of Science:

  • Analytical Chemistry
  • Forensic Toxicology
  • Pharmacology

Background:

  • Gamma-hydroxybutyric acid (GHB) is a low-molecular-weight compound with abuse potential.
  • Challenges in GHB analysis include its polarity, endogenous presence, rapid metabolism, and instability.
  • Accurate detection is crucial for clinical and forensic interpretations.

Purpose of the Study:

  • To comprehensively review methods for screening and confirmation of GHB in biological fluids.
  • To discuss the analytical challenges associated with GHB detection.
  • To evaluate the advantages, limitations, and trends in GHB analysis.

Main Methods:

  • Screening methods discussed include colorimetric, enzymatic, and chromatography-based approaches.
  • Confirmation primarily utilizes gas chromatography-mass spectrometry (GC-MS).
  • Sample preparation involves extraction (liquid-liquid, solid-phase, headspace) and derivatization; "dilute-and-shoot" is also applicable.

Main Results:

  • Various screening and confirmation methods are available for GHB detection.
  • GC-MS is the predominant confirmation technique.
  • Effective sample preparation is key to overcoming analytical challenges.

Conclusions:

  • A range of validated methods exist for GHB screening and confirmation.
  • Understanding analytical challenges is vital for accurate GHB testing.
  • Future trends may involve advancements in chromatographic and electrophoretic techniques.