title: [Simultaneous determination of three organic fluorides in workplace air by portable gas chromatography-mass spectrometer].
abstract: OBJECTIVE
  To establish a method for rapid determination of organic fluorides in the air of a fluorine chemical plant using portable gas chromatography-mass spectrometer (GC-MS).
  
  
  METHODS
  Standard samples of monochlorodifluoromethane, tetrafluoroethylene, and hexafluoropropylene of different concentrations were prepared by static volumetric method with high-purity nitrogen as the diluent gas. The samples were injected into the GC-MS by a hand-held probe. Retention time and characteristic ion were used for qualitative analysis, and the area of selected ion peak was used for quantitative analysis. The standard curves were then created for quantitative determination of the three organic fluorides.
  
  
  RESULTS
  The linear ranges for monochlorodifluoromethane, tetrafluoroethylene, and hexafluoropropylene by the method were 0.39-7.72, 0.45-8.84, and 0.61-12.20 mg/m3, respectively, the average recovery rates for the three concentrations were 102.8%, 96.0%, and 106.5%, respectively, and the average deviations were 2.1%, 5.1%, and 2.4%, respectively.
  
  
  CONCLUSIONS
  The portable GC-MS can be used for the simultaneous qualitative and quantitative analysis of monochlorodifluoromethane, tetrafluoroethylene, and hexafluoropropylene in the workplace air, and the method is simple, fast, and accurate.
authors.forename: Feng
authors.initials: F
authors.lastname: Zhang
authors.forename: Chaoyi
authors.initials: C
authors.lastname: Xin
authors.forename: Baoli
authors.initials: B
authors.lastname: Zhu
mesh_terms: D000395:Air Pollutants, Occupational / Q000032:analysis*; D005617:Chlorofluorocarbons, Methane / Q000032:analysis; D005459:Fluorides / Q000032:analysis*; D005466:Fluorocarbons / Q000032:analysis; D008401:Gas Chromatography-Mass Spectrometry; D017132:Workplace
chemical_list: D000395:Air Pollutants, Occupational; D005617:Chlorofluorocarbons, Methane; D005466:Fluorocarbons; C009755:fluorocarbon 22; C015531:tetrafluoroethylene; D005459:Fluorides