title: Drug detection in urine by chemical ionization mass spectrometry.
mesh_terms: D001463:Barbiturates / Q000032:analysis / Q000652:urine*; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods*; D004364:Pharmaceutical Preparations / Q000652:urine*; D014556:Urine / Q000032:analysis*
chemical_list: D001463:Barbiturates; D004364:Pharmaceutical Preparations