title: Isotope dilution in drug analysis.
mesh_terms: D005476:Fluphenazine / Q000032:analysis; D009020:Morphine / Q000032:analysis; D004364:Pharmaceutical Preparations / Q000032:analysis*; D011865:Radioisotope Dilution Technique
chemical_list: D004364:Pharmaceutical Preparations; D009020:Morphine; D005476:Fluphenazine