title: [Problems on radionuclidic impurities in the use and measurements of radioisotopes].
mesh_terms: D004340:Drug Contamination / Q000517:prevention & control; D004583:Electrons; D011786:Quality Control; D011839:Radiation, Ionizing; D011868:Radioisotopes / Q000032:analysis; D012015:Reference Standards; D012588:Scintillation Counting / Q000379:methods; D013051:Spectrometry, Gamma
chemical_list: D011868:Radioisotopes