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Factors affecting the performance of bioaerosol impactors.

Authors
Grinshpun-SA; Adhikari-A; Cho-SH; Reponen-T; Mainelis-G; Yao-M
Source
European Aerosol Conference 2007, September 9-14, 2007, Salzburg, Austria. Karlsruhe, Germany: Gesellschat fur Aerosolforschung (GAeF) and Universitat Salzburg, 2007 Sep; :T04A004
NIOSHTIC No.
20044418
Abstract
While different principles are utilized for sampling biological aerosol particles, impaction appears to be the most common for collecting bacteria and fungi. This method is used for total and culture-based microbial enumeration. For instance, the total number of viable and non-viable airborne spores is conventionally counted under a microscope after collecting them on a slide of a single-stage impactor, e.g., Air-O-Cell sampling cassette (Zefon Analytical Instruments, Inc., USA), the Burkard Personal Volumetric Air Sampler (Burkard Manufacturing Co. Ltd., U.K.) and Allergenco-D (Environmental Monitoring Systems, Inc., USA) to mention a few. Available bioaerosol impactors are usually equipped with either circular or rectangular (slit) inlets. Some impactors have a single nozzle as an inlet, e.g., Air-O-Cell, while others have hundreds of nozzles, e.g., Millipore Air Tester (Millipore Corp., USA). More importantly, they differ from one another with respect to their ability to efficiently collect bio-particles of specific sizes as well as by the particle deposit uniformity on a substrate (the latter is often critical for applying certain microbial enumeration protocols). The collection efficiency is characterized by the cut-off size, d50 that depends on the flow velocity through the nozzle, nozzle size (W), nozzle shape, non-dimensional jet-to-plate distance (S/W), and other factors.
Keywords
Sampling; Sampling-equipment; Sampling-methods; Air-monitoring; Air-quality-monitoring; Air-sampling; Air-sampling-equipment; Air-sampling-techniques; Author Keywords: Bioaerosols; Collection Efficiency; Inertial Impactor; Cut-off Diameter; Particle Deposition
Publication Date
20070909
Document Type
Abstract
Funding Type
Grant
Fiscal Year
2007
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-K01-OH-008029
Source Name
European Aerosol Conference 2007, September 9-14, 2007, Salzburg, Austria
State
NJ OH
Performing Organization
Rutgers, The State University of New Jersey, New Brunswick
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