title: Determination of underivatized CNS-stimulants and methadone in urinary extracts by glass capillary gas chromatography.
mesh_terms: D000697:Central Nervous System Stimulants / Q000652:urine*; D002849:Chromatography, Gas / Q000379:methods*; D006801:Humans; D008691:Methadone / Q000652:urine*
chemical_list: D000697:Central Nervous System Stimulants; D008691:Methadone