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Comparing PM

Therese Nitter Moazami1, Kristin V Hirsch Svendsen1, Morten Buhagen2

  • 1Department of Industrial Economics and Technology Management (IØT), Norwegian University of Science and Technology (NTNU), 7491, Trondheim, Norway.

Heliyon
|June 5, 2023
PubMed
Summary

The DustTrak DRX monitor showed inaccuracies in measuring dust concentrations compared to gravimetric samples. A correction factor is needed for total dust readings to accurately assess occupational exposure limits.

Keywords:
DustTrak DRXGravimetric samplesOccupational exposureReal-time sensors

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Area of Science:

  • Occupational Health and Safety
  • Environmental Monitoring
  • Industrial Hygiene

Background:

  • Real-time dust monitors offer potential advantages for occupational exposure assessment.
  • Traditional gravimetric sampling is the standard for dust concentration measurement.
  • Evaluating the accuracy of real-time monitors is crucial for reliable exposure assessment.

Purpose of the Study:

  • To assess the precision of the DustTrak DRX monitor against gravimetric samples.
  • To determine the suitability of real-time monitors for occupational dust exposure monitoring.
  • To investigate the performance of the DustTrak DRX with different dust materials.

Main Methods:

  • Exposure chamber experiments were conducted over 19 days, with 4-hour measurements daily.
  • DustTrak DRX real-time monitor data was compared with traditional gravimetric samples.
  • Two stone minerals used in asphalt and lactose powder were used as exposure materials.

Main Results:

  • The DustTrak DRX overestimated PM2.5 and respirable dust concentrations.
  • Total dust concentrations were underestimated by the DustTrak DRX by a factor of nearly two.
  • Discrepancies between the DustTrak DRX and gravimetric samples varied daily and by material.

Conclusions:

  • A correction factor of at least two is recommended for total dust readings from the DustTrak DRX.
  • Real-time monitors can identify exposure sources and aid in control strategy evaluation.
  • Careful interpretation and potential validation are necessary when using DustTrak DRX for occupational exposure profiling.