14. Real-Time Sampling Methods for Aerosols
Published Online: 11 OCT 2004
Copyright © 2004 John Wiley & Sons, Inc.
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
- Published Online: 11 OCT 2004
- Published Print: 3 SEP 2004
Print ISBN: 9780471454359
Online ISBN: 9780471670582
- light scattering device;
- quartz crystal microbalance;
- Arizona road dust;
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.