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Gamma-Hydroxybutyric Acid (GHB), Screen with Confirmation (Mass Spectrometry), Whole Blood

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  • GHB

Expected Turnaround Time

7 - 14 days

Specimen Requirements


Whole blood


5 mL

Minimum Volume

1.2 mL


Gray-top (NaF/oxalate) tube, green-top (heparin) tube, or lavender-top (EDTA) tube

Storage Instructions

Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.

Test Details


Detect use of gamma-hydroxybutyric acid (GHB), a psychoactive drug


Initial presumptive testing by liquid chromatography/tandem mass spectrometry (LC/MS-MS); presumptive positives confirmed to limit of quantitation by definitive gas chromatography/mass spectrometry (GC/MS)

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