title: Opium alkaloids. XII. Quantitative determination of morphine in opium by isotope dilution.
mesh_terms: D000470:Alkaloids / Q000032:analysis*; D000535:Aluminum; D002247:Carbon Isotopes; D055598:Chemical Phenomena; D002621:Chemistry; D008722:Methods; D009020:Morphine / Q000032:analysis*; D009892:Opium / Q000032:analysis*; D010087:Oxides; D011865:Radioisotope Dilution Technique; D014316:Tritium
chemical_list: D000470:Alkaloids; D002247:Carbon Isotopes; D010087:Oxides; D014316:Tritium; D009020:Morphine; D009892:Opium; D000535:Aluminum