title: A sensitive thin-layer chromatographic technique for determining morphine in urine.
mesh_terms: D002855:Chromatography, Thin Layer; D005374:Filtration; D006801:Humans; D006863:Hydrogen-Ion Concentration; D009020:Morphine / Q000652:urine*; D009294:Narcotics / Q000652:urine
chemical_list: D009294:Narcotics; D009020:Morphine