title: Report: contamination of medical oxygen.
mesh_terms: D000769:Anesthesia, Inhalation; D002245:Carbon Dioxide / Q000032:analysis; D004340:Drug Contamination; D005459:Fluorides / Q000032:analysis; D006859:Hydrogen / Q000032:analysis; D010100:Oxygen; D011138:Polytetrafluoroethylene / Q000032:analysis; D013055:Spectrophotometry, Infrared
chemical_list: D002245:Carbon Dioxide; D006859:Hydrogen; D011138:Polytetrafluoroethylene; D005459:Fluorides; D010100:Oxygen