Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

Evaluation of personal aerosol samplers challenged with large particles.

Authors
Aizenberg-V; Choe-K; Grinshpun-SA; Willeke-K; Baron-PA
Source
J Aerosol Sci 2001 Jun; 32(6):779-793
NIOSHTIC No.
20022170
Abstract
The Simplified Test Protocol, developed in our earlier studies for testing personal inhalable aerosol samplers, was evaluated in a specially designed small open-section, close-loop wind tunnel. The sampling efficiencies of three personal inhalable aerosol samplers (IOM, GSP, and Button Aerosol Sampler) were measured with 65 m particles, using the Simplified Test Protocol at four inlet orientations to the wind (0, 90, 180, and 270). The results were compared with the data collected from other evaluation approaches. Analysis of variance (ANOVA) has shown that there is no statistically significant difference in the samplers' performance when they are tested in the small and large wind tunnels following the Simplified Test Protocol and in the large wind tunnel following the conventional approach (samplers on a full-size human manikin). Thus, the Simplified Test Protocol has been shown to be suitable for the performance evaluation of personal inhalable aerosol samplers. The new wind tunnel facility was also found useful for handling very large particles, which is a considerable advantage over traditional wind tunnels. Our new wind tunnel was successfully used to measure the sampling efficiencies of the IOM, GSP, and Button Aerosol Sampler when challenged with particles of up to approximately 250 m aerodynamic diameter at wind velocities of 50 and 100 cms-1. The data show that the sampling efficiency of the IOM sampler depends significantly on the wind velocity and is above 100% for particles of 165 and 241 m mass median aerodynamic diameter. This dependence is not statistically significant for the GSP and Button Aerosol Sampler, whose sampling efficiencies are similar to each other and do not change with increasing test particle size at the indicated wind velocities. Also, the sampling efficiencies of the GSP and Button Aerosol Sampler closely follow the independent data obtained by using a breathing and rotating manikin at a wind velocity of 100 cms-1. The new wind tunnel design is expected to enhance the ability to extend the inhalable convention beyond 100 m.
Keywords
Aerosol-sampling; Inhalation-studies; Sampling-methods; Exposure-levels; Exposure-methods
Contact
S.A. Grinshpun, Aerosol Research and Exposure Assessment Laboratory, Department of Environmental Health, University of Cincinnati, P.O. Box 670056, Cincinnati, OH 45267-0056, USA
CODEN
JALSB7
Publication Date
20010601
Document Type
Journal Article
Email Address
sergey.grinshpun@uc.edu
Funding Amount
639953
Funding Type
Grant
Fiscal Year
2001
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003328
Issue of Publication
6
ISSN
0021-8502
NIOSH Division
DART
Priority Area
Research Tools and Approaches: Exposure Assessment Methods
Source Name
Journal of Aerosol Science
State
OH
Performing Organization
University of Cincinnati, Cincinnati, Ohio
TOP