title: Electret--a new tool for measuring concentrations of radon and thoron in air.
mesh_terms: D000398:Air Pollution, Radioactive / Q000032:analysis*; D011868:Radioisotopes / Q000032:analysis; D011874:Radiometry / Q000295:instrumentation*; D011886:Radon / Q000032:analysis*
chemical_list: D011868:Radioisotopes; D011886:Radon