title: Analysis of biological, clinical, and environmental samples using proton-induced X-ray emission.
mesh_terms: D001826:Body Fluids / Q000032:analysis; D004787:Environmental Pollution / Q000032:analysis; D006801:Humans; D008670:Metals / Q000032:analysis; D008722:Methods; D010936:Plant Extracts / Q000032:analysis; D011506:Proteins / Q000032:analysis; D011522:Protons; D011874:Radiometry; D014020:Tissue Extracts / Q000032:analysis
chemical_list: D008670:Metals; D010936:Plant Extracts; D011506:Proteins; D011522:Protons; D014020:Tissue Extracts