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Collection efficiency of respirator filters challenged with monodisperse latex aerosols.

Authors
Brosseau-LM; Evans-JS; Ellenbecker-MJ; Feldstein-ML
Source
Department of Environmental Science and Physiology, School of Public Health, Harvard University, Boston, Massachusetts; :1-24
Link
NIOSHTIC No.
00192327
Abstract
An evaluation was made of the collection efficiency of electrostatically charged dust/mist respirator filters from ten manufacturers. Filters were challenged with eight sizes of latex spheres in a range which represents the silica (14808607) aerosol used in NIOSH certification tests. At or below the size of 0.102 micrometers, minimum efficiency was reported. Differences in the performance of the filters distributed by the ten manufacturers were noted. One manufacturer produced filters which were significantly lower in their collection efficiency than the other filters tested. Two manufacturers produced filters which were somewhat better than the other eight. By using a statistical evaluation of Weibull transformed data with analyses of covariance and Tukey's significant difference test it was possible to classify the filters into three performance groupings. Such filters were used in air purifying respirators designed for use in environments contaminated by moderately hazardous aerosols. The data collected not only served to assist in developing an empirical model, but also was helpful in the selection of a subset of filters for use in subsequent experiments.
Keywords
NIOSH-Grant; Respirators; Personal-protective-equipment; Respiratory-protection; Dust-inhalation
Contact
Environmental Sci & Physiology Harvard School of Public Hlth 665 Huntington Avenue Boston, MA 02115
CAS No.
14808-60-7
Document Type
Final Grant Report
Funding Amount
134707
Funding Type
Grant
NTIS Accession No.
PB90-154683
NTIS Price
A03
Identifying No.
Grant-Number-R01-OH-02154
NIOSH Division
OEP
Priority Area
Respirators
Source Name
Department of Environmental Science and Physiology, School of Public Health, Harvard University, Boston, Massachusetts
State
MA; GA
Performing Organization
Harvard University, Boston, Massachusetts
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