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Related Experiment Videos

On-site screening for benzene in complex environments

G E Burroughs1, W J Woodfin

  • 1Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Cincinnati, OH 45226, USA.

American Industrial Hygiene Association Journal
|September 1, 1995
PubMed
Summary
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On-site screening for workplace benzene is now possible using portable gas chromatographs (GCs). This method offers reasonable specificity for benzene detection at the part per million (ppm) level in confined spaces.

Area of Science:

  • Occupational Health and Safety
  • Analytical Chemistry
  • Environmental Monitoring

Background:

  • Benzene exposure in confined spaces poses significant health risks.
  • Accurate and rapid on-site monitoring is crucial for worker safety.
  • Existing methods may lack specificity or speed for real-time workplace assessments.

Purpose of the Study:

  • To evaluate a portable gas chromatograph (GC) for on-site benzene screening in complex workplace atmospheres.
  • To compare the performance of portable GCs against other established monitoring techniques.
  • To determine the feasibility of real-time benzene monitoring at the part per million (ppm) level.

Main Methods:

  • Field comparison of a portable GC with other portable GCs, sorbent tubes, and detector tubes.

Related Experiment Videos

  • Sample collection in Tedlar bags for replicate on-site analysis.
  • Laboratory confirmation using capillary column flame ionization GC and GC/mass spectrometry.

    • Main Results:

    • Portable GCs demonstrated the ability to resolve benzene from complex hydrocarbon mixtures.
    • Analysis time for portable GCs was under 10 minutes.
    • Detection limits were often below 0.1 ppm, meeting the Occupational Safety and Health Administration's permissible exposure limit of 1 ppm.

    Conclusions:

    • Portable GCs provide a viable technique for on-site benzene screening in workplace atmospheres.
    • The method offers reasonable specificity and speed for confined space monitoring.
    • Results from portable GCs align with other methods for determining safe entry concentrations.