title: XRF analysis improvement by a simple and fast pre-enrichment method.
mesh_terms: D007475:Ion Exchange Resins; D011868:Radioisotopes; D013050:Spectrometry, Fluorescence / Q000379:methods; D014131:Trace Elements / Q000032:analysis*
chemical_list: D007475:Ion Exchange Resins; D011868:Radioisotopes; D014131:Trace Elements