title: Dual-bed thin-layer chromatography for the separation and detection of drugs of abuse in urine.
mesh_terms: D000661:Amphetamine / Q000652:urine*; D001463:Barbiturates / Q000652:urine*; D002852:Chromatography, Ion Exchange; D002855:Chromatography, Thin Layer; D006801:Humans; D008722:Methods; D009892:Opium / Q000652:urine*; D011605:Psychoses, Substance-Induced / Q000175:diagnosis / Q000652:urine; D019966:Substance-Related Disorders
chemical_list: D001463:Barbiturates; D009892:Opium; D000661:Amphetamine