title: Low-temperature oxygen-fluorine radiofrequency ashing of biological materials in poly(tetrafluoroethylene) dishes prior to the determination of tin, iron, lead and chromium by atomic-absorption spectroscopy.
mesh_terms: D002857:Chromium / Q000032:analysis; D005504:Food Analysis / Q000379:methods*; D007501:Iron / Q000032:analysis; D007854:Lead / Q000032:analysis; D008670:Metals / Q000032:analysis*; D011846:Radio Waves; D013054:Spectrophotometry, Atomic / Q000379:methods; D014001:Tin / Q000032:analysis
chemical_list: D008670:Metals; D002857:Chromium; D007854:Lead; D014001:Tin; D007501:Iron