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  • 标题:Re-characterization of Some Factors Influencing Aerosol Sampling in the Workplace: Results from Field Studies
  • 本地全文:下载
  • 作者:Fengxia Hu ; Limin Wang ; Zhenglun Wang
  • 期刊名称:Journal of Occupational Health
  • 印刷版ISSN:1341-9145
  • 电子版ISSN:1348-9585
  • 出版年度:2014
  • 卷号:56
  • 期号:5
  • 页码:351-358
  • DOI:10.1539/joh.13-0221-OA
  • 出版社:Japan Society for Occupational Health
  • 摘要:

    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)

  • 关键词:Electrostatic charge; Field blank; Limit of detection; Sample mass gain; Sampling method
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