title: Modifications of the XAD-2 resin column method for the extraction of drugs of abuse from human urine.
mesh_terms: D000661:Amphetamine / Q000652:urine*; D002247:Carbon Isotopes; D006801:Humans; D007475:Ion Exchange Resins; D008691:Methadone / Q000652:urine*; D009020:Morphine / Q000652:urine*; D010634:Phenobarbital / Q000652:urine*; D014316:Tritium
chemical_list: D002247:Carbon Isotopes; D007475:Ion Exchange Resins; D014316:Tritium; D009020:Morphine; D000661:Amphetamine; D008691:Methadone; D010634:Phenobarbital