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Document ID (ISN)111325
CIS number 10-0852
ISSN - Serial title 1545-9624 - Journal of Occupational and Environmental Hygiene
Year 2011
Convention or series no.
Author(s) Rengasamy S., Miller A., Eimer B.C.
Title Evaluation of the filtration performance of NIOSH-approved N95 filtering facepiece respirators by photometric and number-based test methods
Bibliographic information Jan. 2011, Vol.8, p.23-30. Illus. 36 ref.
Abstract N95 particulate filtering facepiece respirators are certified by measuring penetration levels photometrically with a presumed severe case test method using charge neutralized NaCl aerosols at 85L/min. However, penetration values obtained by photometric methods have not been compared with count-based methods using contemporary respirators composed of electrostatic filter media and challenged with both generated and ambient aerosols. To understand the effects of particle charge and detection methods, penetration levels for five filtering facepiece respirators were measured using NaCl aerosols with the aerosol challenge and test equipment employed in the NIOSH respirator certification method, and compared with an ultrafine condensation particle counter method. Findings are discussed.
Descriptors (primary) aerosols; filtration efficiency; equipment testing; particulate removing respirators
Descriptors (secondary) comparative study; reliability; description of technique
Document type D - Periodical articles
Subject(s) Personal protection
Broad subject area(s) Chemical safety
Browse category(ies) Personal protection
Respiratory protection