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Title: Particle concentration in exhaled breath

Abstract

Measurements were made of the number of concentration of particles in exhaled breath under various conditions of exercise. A laser light scattering particle spectrometer was used to count particles exhaled by test subjects wearing respirators in a challenge environment of clean, dry air. Precautions were taken to ensure that particles were not generated by the respirators and that no extraneous water or other particles were produced in the humid exhaled air. The number of particles detected in exhales air varied over a range from <0.10 to approx. 4 particles/cm/sup 3/ depending upon the test subject and his activity. Subjects at rest exhaled the lowest concentration of particles, whereas exercises producing a faster respiration rate caused increased exhalation of particles. Exhaled particle concentration can limit the usefulness of nondiscriminating, ambient challenge aerosols for the fit testing of highly protective respirators.

Authors:
;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (USA)
OSTI Identifier:
5269800
Resource Type:
Journal Article
Journal Name:
Am. Ind. Hyg. Assoc. J.; (United States)
Additional Journal Information:
Journal Volume: 48:11
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; PARTICULATES; EXHALATION; RESPIRATORS; PERFORMANCE TESTING; EXERCISE; PARTICLE SIZE; RESPIRATION; SPECTROMETERS; CLEARANCE; EXCRETION; MEASURING INSTRUMENTS; PARTICLES; SIZE; TESTING; 560300* - Chemicals Metabolism & Toxicology

Citation Formats

Fairchild, C I, and Stampfer, J F. Particle concentration in exhaled breath. United States: N. p., 1987. Web. doi:10.1080/15298668791385868.
Fairchild, C I, & Stampfer, J F. Particle concentration in exhaled breath. United States. doi:10.1080/15298668791385868.
Fairchild, C I, and Stampfer, J F. Sun . "Particle concentration in exhaled breath". United States. doi:10.1080/15298668791385868.
@article{osti_5269800,
title = {Particle concentration in exhaled breath},
author = {Fairchild, C I and Stampfer, J F},
abstractNote = {Measurements were made of the number of concentration of particles in exhaled breath under various conditions of exercise. A laser light scattering particle spectrometer was used to count particles exhaled by test subjects wearing respirators in a challenge environment of clean, dry air. Precautions were taken to ensure that particles were not generated by the respirators and that no extraneous water or other particles were produced in the humid exhaled air. The number of particles detected in exhales air varied over a range from <0.10 to approx. 4 particles/cm/sup 3/ depending upon the test subject and his activity. Subjects at rest exhaled the lowest concentration of particles, whereas exercises producing a faster respiration rate caused increased exhalation of particles. Exhaled particle concentration can limit the usefulness of nondiscriminating, ambient challenge aerosols for the fit testing of highly protective respirators.},
doi = {10.1080/15298668791385868},
journal = {Am. Ind. Hyg. Assoc. J.; (United States)},
number = ,
volume = 48:11,
place = {United States},
year = {1987},
month = {11}
}