title: Quantitative morphine assay by means of gas-liquid chromatography and on-column silylation.
mesh_terms: D002849:Chromatography, Gas; D002853:Chromatography, Liquid; D009020:Morphine / Q000032:analysis*; D009892:Opium / Q000032:analysis; D014297:Trimethylsilyl Compounds / Q000032:analysis
chemical_list: D014297:Trimethylsilyl Compounds; D009020:Morphine; D009892:Opium