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A headspace-trap gas chromatography–mass spectrometry (HS-trap GC–MS) method was developed to determine GHB, a low molecular weight compound and drug of abuse, in various biological fluids. Combining this relatively novel and fully automated headspace technique with “in-vial” methylation of GHB allowed for a straightforward approach. One single method could be used for all biofluids (urine, plasma,...
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