title: Extraction techniques for narcotics, barbiturates, and central nervous system stimulants in a drug abuse urine screening program.
mesh_terms: D000661:Amphetamine / Q000652:urine*; D000700:Analgesics / Q000652:urine*; D001463:Barbiturates / Q000652:urine*; D001552:Benzazepines / Q000652:urine; D002852:Chromatography, Ion Exchange; D002855:Chromatography, Thin Layer; D006213:Hallucinogens / Q000652:urine; D006801:Humans; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D019966:Substance-Related Disorders / Q000175:diagnosis*
chemical_list: D000700:Analgesics; D001463:Barbiturates; D001552:Benzazepines; D006213:Hallucinogens; D000661:Amphetamine