title: A method for determining 231Pa in biological samples.
mesh_terms: D000818:Animals; D005243:Feces / Q000032:analysis; D011478:Protactinium / Q000032:analysis* / Q000302:isolation & purification / Q000652:urine; D051381:Rats; D012588:Scintillation Counting / Q000379:methods; D014018:Tissue Distribution
chemical_list: D011478:Protactinium