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Determination of large aerosol particle size by elutriation.

Authors
Tillery-M; Buchan-R
Source
Appl Occup Environ Hyg 2002 Oct; 17(10):717-722
NIOSHTIC No.
20035487
Abstract
Inhalable dust fraction determination requires aerodynamic size information for large aerosol particles. Operation of cascade impactors at flows that collect these particles leads to jet Reynolds numbers outside the range of established impactor performance. Horizontal elutriators, designed to match earlier respirable dust curves at a single flow rate, may be used to provide aerodynamic size information for particles larger than 50 microm. Operation of these elutriators at higher than design flow rates and angles other than horizontal provides for particle penetration over the size range of the inhalable dust curve. Equations are provided that relate penetration, flow rate, and angle to aerodynamic diameter to allow for bracketing the desired size and distribution. The use of impactor data reduction methods to determine size distributions with the MRE horizontal elutriator is examined with a spreadsheet model. Comparison of elutriator size determination with an impactor in the 10 to 15 microm range, where both methods could be used, resulted in reasonable agreement. This method provides for determination of aerodynamic characteristics of large aerosols in field sampling conditions.
Keywords
Aerosol-particles; Aerosol-sampling; Aerosols; Dust-analysis; Dust-collection; Dust-collectors; Dust-control; Dust-exposure; Dust-measurement; Dust-particles; Dust-samplers; Dust-sampling; Dusts; Inhalation-studies; Injuries; Injury-prevention; Environmental-contamination; Environmental-control; Environmental-exposure; Environmental-factors; Environmental-hazards; Environmental-health; Environmental-pollution; Environmental-protection; Safety-climate; Safety-education; Particle-counters; Particulate-dust; Particulate-sampling-methods; Particulates; Author Keywords: Inhalable Dust; Elutriation; Large Aerosols
Contact
M. Tillery, Department of Environmental Health, Colorado State University, Fort Collins
CODEN
AOEHE9
Publication Date
20021001
Document Type
Journal Article
Funding Type
Cooperative Agreement
Fiscal Year
2003
NTIS Accession No.
NTIS Price
Identifying No.
Cooperative-Agreement-Number-U50-OH-007545
Issue of Publication
10
ISSN
1047-322X
Source Name
Applied Occupational and Environmental Hygiene
State
CO
Performing Organization
Colorado State University - Fort Collins
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