title: Improved colorimetric method for assay of amphetamines in urine.
mesh_terms: D000470:Alkaloids / Q000652:urine; D000661:Amphetamine / Q000097:blood / Q000652:urine*; D001391:Azo Compounds; D055598:Chemical Phenomena; D002621:Chemistry; D002624:Chemistry, Clinical / Q000592:standards; D002725:Chloroform; D003116:Color; D003913:Dextroamphetamine / Q000652:urine; D005069:Evaluation Studies as Topic; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D008403:Mass Screening; D008694:Methamphetamine / Q000652:urine; D008722:Methods; D008744:Methylamines; D010423:Pentazocine / Q000652:urine; D004364:Pharmaceutical Preparations / Q000652:urine; D012995:Solubility; D013053:Spectrophotometry; D019966:Substance-Related Disorders / Q000175:diagnosis / Q000652:urine; D013451:Sulfonic Acids; D013464:Sulfuric Acids / Q000652:urine; D013997:Time Factors
chemical_list: D000470:Alkaloids; D001391:Azo Compounds; D007202:Indicators and Reagents; D008744:Methylamines; D004364:Pharmaceutical Preparations; D013451:Sulfonic Acids; D013464:Sulfuric Acids; D008694:Methamphetamine; D002725:Chloroform; D000661:Amphetamine; D010423:Pentazocine; D003913:Dextroamphetamine