title: [Determination of chloroform and carbon tetrachloride in residential air by capillary gas chromatography].
abstract: OBJECTIVE
  To establish solvent desorption capillary gas chromatography method for determination of chloroform and carbon tetrachloride in residential air.
  
  
  METHODS
  The sample was absorbed by active carbon glass tube, then desorbed by Acetone and determined by Capillary Gas Chromatography.
  
  
  RESULTS
  Linear range of this method: 5.0 x 10(-4)-1.0 x 10(-1) mg/m3 for chloroform, 1.9 x 10(-4)-1.0 x 10(-2) mg/m3 for carbon tetrachloride. The sample could be stored in the active carbon glass tube for 7 days. The re-occurrence rate of this method is good. RSD is: 0.41%-1.54% for chloroform, 0.31%-1.03% for carbon tetrachloride. Detection limit of this method: 1.5 x 10(-3) ng for chloroform, and 5.8 x 10(-4) ng for carbon tetrachloride. Recovery rate for different concentrations: 88.5%-98.6% For chloroform, and 91.0%-99.0% for carbon tetrachloride. Sampling efficiency: 93.7%-99.2% for chloroform, and 90.6%-99.2% for carbon tetrachloride. Other Volatile halogenated hydrocarbons with similar structures and similar nature in the residential air do not interfere the measurement.
  
  
  CONCLUSIONS
  The method was easy and quick, with high sensibility. It was applicable to monitor the chloroform and carbon tetrachloride in residential air.
authors.affiliation: Shenzhen Center For Disease Control And Prevention, Shenzhen 518020, China. kl-1969@tom.com
authors.forename: Li
authors.initials: L
authors.lastname: Kang
authors.forename: Guihua
authors.initials: G
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Lisha
authors.initials: L
authors.lastname: Mao
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis*; D002251:Carbon Tetrachloride / Q000032:analysis*; D002681:China; D002725:Chloroform / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods*; D004784:Environmental Monitoring
chemical_list: D000393:Air Pollutants; D002725:Chloroform; D002251:Carbon Tetrachloride