title: [Detection of chlorpyrifos in air of workplace with HPLC].
abstract: OBJECTIVE
  To establish the method of detecting the concentrations of chlorpyrifos in air of workplace with high performance liquid chromatographic (HPLC).
  
  
  METHODS
  According to standards of methods for determining the chemical substances in workplace air, chlorpyrifos in the air was collected by silicone tube, then dissolved by acetonitrile and determined by high performance liquid chromatography with UV-detector.
  
  
  RESULTS
  There was a linear relationship within the range of 0 ∼ 10.0 µg/ml, and regression equation was y = 5206.1x - 104.7, correlation coefficient was 0.9999, the detection limit was 0.006 µg/ml. The lowest detected concentration was 0.001 mg/m(3) (sampling volume 4.5 L). The average recoveries was 98.3% ∼ 102.5%. The within-run precision was 1.96% ∼ 4.39%, the between-run precision was 2.76% ∼ 5.87%. The desorption efficiencies were 99.0% ∼ 103.3% and the sampling efficiencies were 94%. The samples in silicone tube could be stored for 15 days at room temperature.
  
  
  CONCLUSIONS
  The present method could meet with the requirements of Guide for establishing occupational health standards-Part 4 Determination methods of air chemicals in workplace and be feasible for determination of chlorpyrifos in workplace air.
authors.affiliation: Zibo Hospital for Occupational Diseases Control and Treatment, Zibo, Shandong Province 255000, China.
authors.forename: Qi-tao
authors.initials: QT
authors.lastname: Tan
authors.forename: Huai-sheng
authors.initials: HS
authors.lastname: Bai
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
mesh_terms: D000395:Air Pollutants, Occupational / Q000032:analysis*; D004390:Chlorpyrifos / Q000032:analysis* / Q000633:toxicity; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D057230:Limit of Detection; D015203:Reproducibility of Results; D017132:Workplace
chemical_list: D000395:Air Pollutants, Occupational; D004390:Chlorpyrifos