title: The 40K activity of one gram of potassium.
authors.forename: W S
authors.initials: WS
authors.lastname: Watson
mesh_terms: D002138:Calibration; D006801:Humans; D019047:Phantoms, Imaging; D011188:Potassium / Q000032:analysis* / Q000737:chemistry; D011197:Potassium Radioisotopes / Q000032:analysis*
chemical_list: D011197:Potassium Radioisotopes; D011188:Potassium