title: Morphine in human biological fluids by electron-capture gas chromatography.
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D004583:Electrons; D006801:Humans; D008832:Microchemistry; D009020:Morphine / Q000032:analysis* / Q000097:blood / Q000652:urine
chemical_list: D009020:Morphine