title: Utilization of thin-layer chromatography and enzyme immunoassay systems to screen and confirm the presence of morphine, codeine, phencyclidine and benzoylecgonine.
abstract: Thin-layer chromatography (TLC) and enzyme immunoassay (EMIT) were coordinated to produce unequivocal identification of certain substances. Samples were extracted and subjected to TLC. After development, "positive" spots were scraped from the plate, buffered, centrifuged, and subjected to EMIT. Interferences were not encountered.
mesh_terms: D000701:Analgesics, Opioid / Q000652:urine*; D002855:Chromatography, Thin Layer / Q000379:methods; D003042:Cocaine / Q000031:analogs & derivatives / Q000652:urine; D003061:Codeine / Q000652:urine; D006801:Humans; D007124:Immunoenzyme Techniques; D009020:Morphine / Q000652:urine; D010622:Phencyclidine / Q000652:urine
chemical_list: D000701:Analgesics, Opioid; C005618:benzoylecgonine; D009020:Morphine; D003042:Cocaine; D010622:Phencyclidine; D003061:Codeine