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Identification of faceseal leak sites on a half-mask respirator.

Authors
Oestenstad-RK; Perkins-JL; Rose-VE
Source
Department of Environmental Health Sciences, School of Public Health, University of Alabama at Birmingham, Birmingham, Alabama, 1989 Mar; :1-23
Link
NIOSHTIC No.
00192789
Abstract
A method was developed to identify the location and shape of respirator faceseal leaks by the deposition of a fluorescent tracer. To provide a test environment with stable aerosol concentration and size distribution of 4-methyl-7-diethylaminocoumarin (MDC), an aerosol generating, conditioning and exposure system was designed and tested. Both a mannequin and human subjects were used to test for faceseal leak sites by deposition of the tracer aerosol and subsequent observation under longwave ultraviolet lighting. Test parameters were identified for the optimal definition of leaks. Photographic techniques were developed to document the identified leak sites. Leak sites which could be detected visually and by photographic methods were classified as to their location and their one dimensional shape. The study demonstrated the feasibility of identifying respirator faceseal leak sites with an aerosol of MDC using the described generating, conditioning and exposure system. The system was found to be capable of providing a constant output of an aerosol with the desired size distribution characteristics. Sufficient deposition of the fluorescent tracer was made to allow visual detection of faceseal leak sites on a mannequin and human subjects. Photographic documentation of identified leak sites was presented.
Keywords
NIOSH-Grant; Respirators; Protective-equipment; Pulmonary-system-disorders; Personal-protective-equipment; Respiratory-protection
Contact
Environmental Health Sciences Univ. of Alabama at Birmingham School of Public Health Birmingham, AL 35294
Publication Date
19890301
Document Type
Final Grant Report
Funding Amount
18639
Funding Type
Grant
Fiscal Year
1989
NTIS Accession No.
PB90-162389
NTIS Price
A03
Identifying No.
Grant-Number-R03-OH-02580
NIOSH Division
OEP
Priority Area
Respirators; Pulmonary-system-disorders
Source Name
Department of Environmental Health Sciences, School of Public Health, University of Alabama at Birmingham, Birmingham, Alabama Grant No. R03-OH-02580, 23 pages, 30 references
State
AL
Performing Organization
University of Alabama at Birmingham, Birmingham, Alabama
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