title: A simple concentration procedure for trace metals for x-ray fluorescence and atomic absorption spectrometry.
mesh_terms: D005453:Fluorescence; D006863:Hydrogen-Ion Concentration; D008670:Metals / Q000302:isolation & purification*; D008722:Methods; D008832:Microchemistry; D013050:Spectrometry, Fluorescence; D013054:Spectrophotometry, Atomic; D014131:Trace Elements / Q000302:isolation & purification*; D014965:X-Rays
chemical_list: D008670:Metals; D014131:Trace Elements