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Respirator fit and protection through determination of air and particle leakage.

Authors
Xu-M; Han-D; Hangal-S; Willeke-K
Source
Ann Occup Hyg 1991 Feb; 35(1):13-24
NIOSHTIC No.
00199177
Abstract
An investigation was conducted to provide a test which, instead of using a surrogate mask, would measure the protection in the workplace for the respirator actually worn. The investigation was performed due to the observation that the correlation between the field measurements of the Workplace Protection Factor and the laboratory tested Fit Factor for respirator effectiveness was poor. The laboratory technique as described used a dynamic pressure test to quantify the air flow through the leak. Calibration data related the contaminant influx to this air flow, and a similar pressure test determined the flow through the respirator cartridges and, therefore, the dilution characteristics. Contaminant removal characteristics of the cartridges were stored in the computer. The contaminant penetration was calculated from these data and from the removal efficiency. Through specification of the aerosol size distribution and the method of measurement, protection factors were calculated for specific work environments, work loads and respirator cartridges. The protection factor was highly dependent on the method of measuring the contaminant and on the cartridges used. In this investigation the linkage between face seal test and protection factor was demonstrated for aerosols, but was noted as equally valid for any air contaminant.
Keywords
NIOSH-Author; Work-environment; Air-quality-monitoring; Respirators; Respiratory-protection; Personal-protective-equipment; Safety-equipment; Aerosols; Airborne-dusts
CODEN
AOHYA3
Publication Date
19910201
Document Type
Journal Article
Funding Type
Grant
Fiscal Year
1991
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-01301
Issue of Publication
1
ISSN
0003-4878
Priority Area
Respirator Research; Respirators
Source Name
Annals of Occupational Hygiene
State
OH
Performing Organization
University of Cincinnati, Cincinnati, Ohio
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