title: Radiochemical determination of protactinium-231 in environmental and biological materials.
mesh_terms: D004785:Environmental Pollutants / Q000032:analysis; D011478:Protactinium / Q000032:analysis*; D011848:Radioactive Pollutants / Q000032:analysis; D011854:Radiochemistry
chemical_list: D004785:Environmental Pollutants; D011848:Radioactive Pollutants; D011478:Protactinium