title: Internal standardization in energy-dispersive X-ray fluorescence spectrometric determination of trace elements in urine after preconcentration with a chelating filter.
mesh_terms: D002614:Chelating Agents; D005374:Filtration; D006801:Humans; D013052:Spectrometry, X-Ray Emission / Q000379:methods; D014131:Trace Elements / Q000652:urine*
chemical_list: D002614:Chelating Agents; D014131:Trace Elements