A DIRECT IMMERSION SOLID-PHASE MICROEXTRACTION GAS CHROMATOGRAPHY/MASS SPECTROMETRY (DI-SPME-GC/MS) METHOD FOR THE SIMULTANEOUS DETECTION OF LEVAMISOLE AND MINOR COCAINE CONGENERS IN HAIR SAMPLES FROM CHRONIC ABUSERS

Since levamisole has been increasingly found as a component of illicit drugs, a robust method to detect its presence in hair samples is needed. However, no systematic research on the detection of levamisole in hair samples has been published. The method presented here uses direct immersion solid-phase microextraction coupled with gas chromatography and mass spectrometry (DI-SPME-GC/MS) to detect levamisole and minor cocaine congeners in hair samples using a single-extraction method.