Respirator Efficiency Measurement Using Quantitative DOP Man Tests

Hyatt, E. C.; Pritchard, Jack A.; Richards, C.P.

doi:10.1080/0002889728506721

Cited by 14 publications

(2 citation statements)

References 3 publications

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“…RFTPs firstly need the anthropometric data of respirator users. The proper facial anthropometric dimensions for defining respirator fit test panels will make respirator design suitably for tight-fitting with the wearer's face [14,15,16,17,18].…”

Section: Respirator Fit Test Panelsmentioning

confidence: 99%

Overview of Development on Self-Inhalation Filter Type Respiratory Protective Technology Against Polluted Air in Residential Environment

Yang¹

2015

AJCEM

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There are many types of respirators used in residential environment for individual respiratory protection. Many factors may influence the protective performance of respirators. This paper tries to review the factors in the research development of self-inhalation filter type respiratory protective technology against polluted air in residential environment. Those factors mainly include the leakage; respirator fit test panels, constructing fibers and respirator performance test method. The conclusions from the reviewed literatures show that: (1) the leakage of respirator worn on individuals may be an important reason for the decrease of respirator's protection. (2) The respirator fit test panels should be developed in advance because they are vital to the good design and the valid test of respirators. (3) The fibers for the filtering part of respirators may be also important to the protective performance of the respirators. Low inhalation resistance and high filtering efficiency are the expectation to a good respirator. (4) The respirator test method applied for evaluating the protective performance depends on the location or environment of the used respirator. Howsoever, the challenge and the most penetrating particle size should be considered before confirming the respirator test method.

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Section: Respirator Fit Test Panelsmentioning

confidence: 99%

Overview of Development on Self-Inhalation Filter Type Respiratory Protective Technology Against Polluted Air in Residential Environment

Yang¹

2015

AJCEM

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“…To evaluate the fit characteristics of facepieces, quantitative fit test (QNFT) methods were developed in the 1960s and the early 1970s. (1)(2)(3)(4) Available QNFT equipment is currently based on either aerosols or pressure. Aerosol methods typically use corn oil, sodium chloride, or ambient aerosols.…”

mentioning

confidence: 99%

Comparison of Six Respirator Fit-Test Methods with an Actual Measurement of Exposure in a Simulated Health Care Environment: Part I — Protocol Development

Coffey

Campbell

Myers

et al. 1998

American Industrial Hygiene Association Journal

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Quantitative fit tests (QNFT) have been assumed to be predictive of the protection respirators would provide to a wearer in the workplace. Workplace studies have consistently found no correlation between quantitative fit factors and workplace protection factors. This article is the first in a series of three describing a study designed to compare the fit factors from six QNFT methods against the actual dose of 1,1,2 trichloro-1,2,2 trifluoroethane (Freon-113) received under the same laboratory conditions. Five preliminary studies conducted to develop the protocol to assess the respirator wearer's dose through end-exhaled air analysis are described in this article: (1) chamber characterization, (2) end-exhaled air sampling, (3) skin absorption testing, (4) pharmacokinetic modeling, and (5) subject characterization. It was established that the concentration of corn oil aerosol and Freon-113 could be generated simultaneously in the chamber. It was ascertained that the optimum time to sample the exhaled breath was 30 minutes after the subject exited the chamber. It was also found that in a chamber concentration of 500 ppm, without any respiratory exposure, Freon-113 was still present in the end-exhaled air. This was attributed to skin absorption. The end-exhaled air of subjects exposed to 0.5, 3, 5, 25, 50, and 100 ppm (30 minute time-weighted average) of Freon-113 was evaluated at 30 minutes postexposure. This characterization was then used to predict the actual dose of Freon-113 received during the method comparison and validation testing to be described in subsequent articles.

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Workplace Aerosol Measurement

Volkwein

Maynard

Harper

2011

Aerosol Measurement

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Traditionally, workplace aerosols have been categorized as fumes (fine particles and agglomerates generated through combustion and vapor condensation), smokes (solid and liquid particles arising from incomplete combustion), dusts (solid particles generated through mechanical means), sprays (liquid aerosols with relatively large particle sizes, usually produced through mechanical means), and mists (liquid aerosols with finer particles, generally produced through condensation or atomization) (Vincent 1995).

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Respirator Efficiency Measurement Using Quantitative DOP Man Tests

Cited by 14 publications

References 3 publications

Overview of Development on Self-Inhalation Filter Type Respiratory Protective Technology Against Polluted Air in Residential Environment

Overview of Development on Self-Inhalation Filter Type Respiratory Protective Technology Against Polluted Air in Residential Environment

Comparison of Six Respirator Fit-Test Methods with an Actual Measurement of Exposure in a Simulated Health Care Environment: Part I — Protocol Development

Workplace Aerosol Measurement

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