14. Real-Time Sampling Methods for Aerosols

  1. Henry J. McDermott

Published Online: 11 OCT 2004

DOI: 10.1002/0471670588.ch14

Air Monitoring for Toxic Exposures, Second Edition

Air Monitoring for Toxic Exposures, Second Edition

How to Cite

McDermott, H. J. (2004) Real-Time Sampling Methods for Aerosols, in Air Monitoring for Toxic Exposures, Second Edition, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/0471670588.ch14

Author Information

  1. H. J. McDermott, Inc., Moraga, California, USA

Publication History

  1. Published Online: 11 OCT 2004
  2. Published Print: 3 SEP 2004

ISBN Information

Print ISBN: 9780471454359

Online ISBN: 9780471670582

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Keywords:

  • aerosol;
  • nephelometer;
  • light scattering device;
  • piezobalance;
  • quartz crystal microbalance;
  • Arizona road dust;
  • calibration

Summary

Real time field instruments for measuring aerosols can determine parameters such as mass, respirable mass, total particle count, or particle size distribution. Most instruments are too large to be worn by the worker; thus they are used mainly for area or spot readings. However, a few devices are small enough to be worn by the worker and have datalogging capabilities to provide a time-dependent profile of exposure over a work period, as well as integrated TWA exposures. The accurate measurement of aerosols is more complex and difficult than the measurement of gas and vapor molecules. Aerosols are subject to many factors such as size, shape, settling velocity, and other influences relating to the dynamics of particle collection. Direct reading instruments for aerosols are calibrated by the manufacturer with one or more “standard” aerosols with known size distributions.