A Comparison of Two Sampling Methods for the Detection of Airborne Methylene Bisphenyl Diisocyanate

Details

• Personal Author:
  Brazile WJ ; Sandfort DR ; Sargent LM ; Schaeffer JW
• Description:
  The purpose of this study was to determine if there was a significant difference between two readily available sampling methodologies for airborne methylene bisphenyl diisocyanate (MDI), which is an essential precursor in the spray-on truck bed lining industry. Seventy-two personal airborne samples of MDI were collected and analyzed from nine spray-on truck bed liner businesses in northern Colorado. Wide ranges of exposure concentrations were encountered during the spray-on application, including concentrations that exceeded the OSHA permissible exposure limit. The highest airborne MDI concentration measured was 690 ppb. A statistically significant difference between field-desorbed and laboratory-desorbed methods was determined. The field-desorbed sampling methodology yielded consistently higher MDI concentrations than the laboratory-desorbed sampling methodology, which suggests that immediate desorption minimizes isocyanate loss and potential underestimations. Results from the analysis of variance also indicated that different facility factors and environmental conditions within each company, such as the use of ventilation or humidity level, affected the MDI concentrations, indicating the potential for better mitigation of exposures using the hierarchy of controls. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Dust Environmental Monitoring Humidity Isocyanates Occupational Health Safety Ventilation
• Keywords:
  4,4'methylenebisphenyl Isocyanate Airborne Particles Air Sampling Equipment Air Sampling Techniques Author Keywords: Field Desorbed Breathing Zone Diisocyanates Dust Inhalation Dust Sampling Exposure Assessment Laboratory Desorbed MDI Sampling Methods Spray-on Truck Bed Liner Sprays

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• ISSN:
  1545-9624
• Document Type:
  Text
• Funding:
  Cooperative Agreement
• Genre:
  Journal Article
• Place as Subject:
  Colorado ; OSHA Region 8
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  213-221
• Volume:
  10
• Issue:
  4
• NIOSHTIC Number:
  nn:20052156
• Citation:
  J Occup Environ Hyg 2013 Apr; 10(4):213-221
• Contact Point Address:
  Joshua W. Schaeffer, Department of Environmental and Radiological Health Sciences, 1681 Campus Delivery, Colorado State University, Ft. Collins, CO 80523
• Email:
  joshua.schaeffer@colostate.edu
• CAS Registry Number:
  Diphenylmethane diisocyanate (CAS RN 101-68-8)
• Federal Fiscal Year:
  2013
• NORA Priority Area:
  Agriculture, Forestry and Fishing
• Performing Organization:
  Colorado State University - Ft. Collins
• Peer Reviewed:
  True
• Start Date:
  20030915
• Source Full Name:
  Journal of Occupational and Environmental Hygiene
• End Date:
  20270914
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:44418166becbd7abafb3f1a7757523d1b360c6fdb1255ddba582a40e8764166aec4c8c3b21fa06c92ea9652bd085d10329e5b80f468d2e2a5c99df27695b6331
• Download URL:
  https://stacks.cdc.gov/view/cdc/211745/cdc_211745_DS1.pdf
• File Type:
  [PDF - 356.49 KB ]