Re‐characterization of Some Factors Influencing Aerosol Sampling in the Workplace: Results from Field Studies

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  • Hu Fengxia
    Department of Occupational and Environmental Health, MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology
  • Wang Limin
    Department of Occupational and Environmental Health, MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology
  • Wang Zhenglun
    Department of Occupational and Environmental Health, MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology
  • Liang Jiaojun
    Wuhan Institute for Occupational Disease Control
  • Li Jichao
    Wuhan Institute for Occupational Disease Control
  • Mao Geshi
    Wuhan Institute for Occupational Disease Control
  • Yi Gulin
    Wuhan Institute for Occupational Disease Control
  • Zhao Lei
    Department of Occupational and Environmental Health, MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology
  • Wu Jiabing
    Department of Occupational and Environmental Health, MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology
  • Koob Michael
    IGF - Institut für Gefahrstoff-Forschung der Berufsgenossenschaft Rohstoffe und chemische Industrie an der Ruhr Universität Bochum Prävention
  • Chen Weihong
    Department of Occupational and Environmental Health, MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology
  • Dahmann Dirk
    IGF - Institut für Gefahrstoff-Forschung der Berufsgenossenschaft Rohstoffe und chemische Industrie an der Ruhr Universität Bochum Prävention
  • Yang Lei
    Department of Occupational and Environmental Health, MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology

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  • Re-characterization of Some Factors Influencing Aerosol Sampling in the Workplace: Results from Field Studies

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Objective: Workplace aerosol sampling is challenged by its influencing factors and methodological limitations. Some factors, including blank setting, electrostatic effect, sample mass gain, and limit of detection (LOD), were studied to characterize them further and thereby to improve the sampling method. Methods: Through a field sampling in two shipyards and by an analysis of a large amount of dust data from different industries, the influencing factors were comparatively studied with emphasis on their effect on the final result. Results: After calibration with field blanks, the concentrations of most sample types in the shipyards decreased significantly, varying by as much as −24.3% of the final measurements. After laboratory blank calibration, dust concentrations increased or decreased without a definite change trend. With a variation of −1.8%, only the measurements of Chinese “total dust” sampled with polypropylene filters were significantly influenced by the electrostatic effect. The LOD coincidence rate was only 17.3% for American respirable dust in different industries and 12.2% for respirable particles collected by normal flow rate samplers (FSP2) in the shipyards. The latter increased to 73.9% when high flow samplers (FSP10) were used. Conclusions: It was suggested that field blank calibration was the predominant influencing factor in comparison with electrostatic effect and laboratory blank adjustment. The LOD coincidence rate was too low for reliable sampling, and this might be improved by use of high flow samplers.(J Occup Health 2014; 56: 351-358)

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