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Design and use of a settling chamber for sampler evaluation under calm-air conditions.

Authors
Feather-GA; Chen-BT
Source
Aerosol Sci Tech 2003 Mar; 37(3):261-270
NIOSHTIC No.
20022662
Abstract
A compact, low cost, and easy to operate experimental system was developed for evaluating personal samplers in a calm-air environment. The system can provide uniformly distributed monodisperse microspheres up to 69.7 wm in a quiescent environment for determining sampler efficiencies using a fluorescence method. The reference concentration was measured using one vertical and two horizontal sharp-edged probes. The vertical sampling probe met the criterion for greater than 90% sampling efficiency for upward facing cylindrical probes given by Agarwal and Liu, except at the particle size of 69.7 wm. In addition, the consistent agreement among all three reference sampling probes at all particle sizes tested implied that representative measurements of aerosol concentrations in the test section were achieved. In this study, the RespiCon (Model No. 8522, TSI Inc., St. Paul, MN, USA) and IOM (Cat. No. 225-70, SKC Inc., Eighty Four, PA, USA) personal aerosol samplers were evaluated in the system with air velocities in the sampling region below 1.5 cm/s. The sampling efficiency of the IOM was near 100% at all particle sizes, while the RespiCon matched the conventional respirable and thoracic convention curves but undersampled the inhalable fraction.
Keywords
Samplers; Air-monitoring; Air-samplers; Air-samples; Air-sampling; Environmental-factors; Aerosol-sampling; Aerosols
Contact
Exposure Assessment Branch, Health Effects Laboratory Division, Center for Disease Control and Prevention, National Institute for Occupational Safety and Health, 1095 Willowdale Road, M/S/ 3030, Morgantown, WV 26505-2888
CODEN
ASTYDQ
Publication Date
20030301
Document Type
Journal Article
Email Address
gcf5@cdc.gov
Fiscal Year
2003
NTIS Accession No.
NTIS Price
Issue of Publication
3
ISSN
0278-6826
NIOSH Division
HELD
Priority Area
Research Tools and Approaches: Exposure Assessment Methods
Source Name
Aerosol Science and Technology
State
WV
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