title: [Determination of chloropicrin in air of workplace by gas chromatography with absorption solution collection].
abstract: OBJECTIVE
  To establish a method for determination of chloropicrin in the air of workplace by gas chromatography with liquid absorption collection.
  
  
  METHODS
  Chloropicrin in sample air was collected by absolute ethyl alcohol in a porous glass plate absorption tube. Following direct sample loading, samples were separated by gas chromatography and detected with a micro-electron capture detector. The present method was compared with the national standard method.
  
  
  RESULTS
  The range of linearity was 0-3.0 µg/ml, and the regression equation was y = 3488.80x-57.84, with a correlation coefficient of 0.999 4. The detection limit was 0.003 µg/ml, with a minimum detectable concentration of 0.005 mg/m³ based on a 3.0 L sampling volume. The average recovery rate was 98.9%∼103.2%. The within-run precision was 0.96%-2.12%, and the between-run precision was 2.75%-4.59%. The sampling efficiency was 98.6%. Samples in porous glass plate absorption tube could be stored at 4 °C for at least 5 days. The result ratio of this method to the national standard method was 97.7%-108.0% .
  
  
  CONCLUSIONS
  The present method meets the requirements of "Guide for establishing occupational health standards-Part 4: Determination methods of air chemicals in workplace" (GBZ/T 210.4-2008), and is feasible for determination of chloropicrin in the air of workplace.
authors.affiliation: Zibo Hospital for Occupational Diseases Control and Treatment, Shandong 255000, China. E-mail: zbt1999@126.com.
authors.forename: Qitao
authors.initials: Q
authors.lastname: Tan
authors.affiliation: Zibo Hospital for Occupational Diseases Control and Treatment, Shandong 255000, China.
authors.forename: Huaisheng
authors.initials: H
authors.lastname: Bai
authors.affiliation: Zibo Hospital for Occupational Diseases Control and Treatment, Shandong 255000, China.
authors.forename: Mingjian
authors.initials: M
authors.lastname: Gao
mesh_terms: D000388:Air / Q000032:analysis*; D000395:Air Pollutants, Occupational / Q000032:analysis*; D002849:Chromatography, Gas / Q000379:methods*; D006843:Hydrocarbons, Chlorinated / Q000032:analysis*; D017132:Workplace
chemical_list: D000395:Air Pollutants, Occupational; D006843:Hydrocarbons, Chlorinated; C100187:chloropicrin