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Analysis of portable impactor performance for enumeration of viable bioaerosols.

Authors
Yao-M; Mainelis-G
Source
J Occup Environ Hyg 2007 Jul; 4(7):514-524
NIOSHTIC No.
20032462
Abstract
Portable impactors are increasingly being used to estimate concentration of bioaerosols in residential and occupational environments; however, little data are available about their performance. This study investigated the overall performances of the SMA MicroPortable, BioCulture, Microflow, Microbiological Air Sampler (MAS-100), Millipore Air Tester, SAS Super 180, and RCS High Flow portable microbial samplers when collecting bacteria and fungi both indoors and outdoors. The performance of these samplers was compared with that of the BioStage impactor. The Button Aerosol Sampler equipped with gelatin filter was also included in the study. Results showed that the sampling environment can have a statistically significant effect on sampler performance, most likely due to the differences in airborne microorganism composition and/or their size distribution. Data analysis using analysis of variance showed that the relative performance of all samplers (except the RCS High Flow and MAS-100) was statistically different (lower) compared with the BioStage. The MAS-100 also had statistically higher performance compared with other portable samplers except the RCS High Flow. The Millipore Air Tester and the SMA had the lowest performances. The relative performance of the impactors was described using a multiple linear regression model (R(2) = 0.83); the effects of the samplers' cutoff sizes and jet-to-plate distances as predictor variables were statistically significant. The data presented in this study will help field professionals in selecting bioaerosol samplers. The developed empirical formula describing the overall performance of bioaerosol impactors can assist in sampler design.
Keywords
Microbial-test-systems; Microbiology; Airborne-particles; Inhalation-studies; Air-contamination; Air-quality; Air-samples; Air-sampling-equipment; Air-sampling; Bacterial-dusts; Bacteria; Fungi; Particulate-dust; Particulate-sampling-methods; Particle-aerodynamics; Sampling-methods; Sampling; Exposure-assessment; Exposure-methods; Statistical-analysis; Aerosols
Contact
Gediminas Mainelis, Department of Environmental Sciences, Rutgers, The State University of NewJersey, 14 College Farm Road, New Brunswick, NJ 08901-8551
CODEN
JOEHA2
Publication Date
20070701
Document Type
Journal Article
Email Address
mainelis@envsci.rutgers.edu
Funding Type
Grant
Fiscal Year
2007
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-K01-OH-008029
Issue of Publication
7
ISSN
1545-9624
Source Name
Journal of Occupational and Environmental Hygiene
State
NJ
Performing Organization
Rutgers, The State University of New Jersey, New Brunswick
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