A field study to assess the long-term sampling feasibility of evacuated canisters and the development of a mathematical model to analyze potential sampling bias

Details

• Personal Author:
  Rossner A ; Wick DP
• Description:
  Small, evacuated canisters (300 mL) equipped with a unique capillary flow controller were used to evaluate airborne concentrations of Stoddard solvent. The physical characteristics of the flow controller permitted the collection of air samples for a time period of 40 hours (5 consecutive work days). Long-term sampling (greater than 8 hours) is rarely performed in industrial hygiene due to limitations in current air sampling technology but may provide valuable information in characterizing worker cumulative exposures for some processes. A field study was performed to evaluate the feasibility of collecting a 40-hour area sample using the small canisters. Six canister samplers were used as area monitors to evaluate a cleaning operation for an entire workweek. For comparison, 30 diffusive badges (6 per day) were simultaneously used to monitor the same process. No statistical difference was found between the time-weighted average for the two sampling methods (p>0.05). In addition, the canister samples integrate airborne concentrations for an entire workweek and therefore peak concentrations are not explicitly observed. Thus, an examination of peak exposures using simulated concentrations was conducted. A mathematical model was developed to determine whether a significant sampling bias was associated with long-term canister sampling when peak concentrations are present. The maximum possible bias was determined to be less than 9% for peak amplitudes having 10 times the background concentration and well below that for smaller amplitudes. Long-term sampling with the small, evacuated canisters was found to provide results comparable to sorbent sampling methods but with the added benefit of a significantly increased sampling time. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Environmental Monitoring Occupational Health Particulate Matter Safety Solvents Workplace
• Keywords:
  Air-filters Air-quality-measurement Air-samplers Air-samples Air-sampling Air-sampling-equipment Air-sampling-techniques Airborne-particles Author Keywords: Air Sampling Capillary-canister Environmental-technology Evacuated Canister Exposure-levels Long-term Sampling Mathematical-models Measurement-equipment Quantitative-analysis Sampling-methods Sampling Bias Solvent-vapors Statistical-analysis Time-weighted-average-exposure Work-environment Workplace-monitoring Workplace-studies

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• ISSN:
  1545-9624
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  New York ; OSHA Region 2
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  474-480
• Volume:
  2
• Issue:
  9
• NIOSHTIC Number:
  nn:20038834
• Citation:
  J Occup Environ Hyg 2005 Sep; 2(9):474-480
• Contact Point Address:
  Alan Rossner, Clarkson University, P.O. Box 5805, Potsdam, NY 13699
• Email:
  rossner@clarkson.edu
• Federal Fiscal Year:
  2005
• Performing Organization:
  Clarkson University, Potsdam, New York
• Peer Reviewed:
  True
• Start Date:
  20050801
• Source Full Name:
  Journal of Occupational and Environmental Hygiene
• End Date:
  20070731
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:0a245a0ffda3d2d8e5481144145a8750cdaf36a1addfcaa99e0c00e87b22030ee7e4aad801531087f673d06a7657a749355e51442235407ac404909002e96937
• Download URL:
  https://stacks.cdc.gov/view/cdc/192395/cdc_192395_DS1.pdf
• File Type:
  [PDF - 289.63 KB ]