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An evaluation of charcoal cloth as a potential field monitor for the efficacy of chemical protective clothing.

Authors
Perkins-JL; Vescial-K
Source
Appl Occup Environ Hyg 1997 May; 12(5):362-366
NIOSHTIC No.
20024444
Abstract
Generally the results of manufacturers' permeation tests are used to select chemical protective clothing. However, these test results are subject to several sources of error. In addition, certain conditions, such as temperature, exposure time and duration, immobility of the garment, and sample thickness, which is dependent on the location from which the garment is sampled for testing, are controlled in the experiment in ways which may not reflect actual use conditions. The only way to accurately determine the efficacy of a garment is to monitor its permeation resistance in the field. For volatile permeants this is difficult, since the most obvious way to trap these compounds after permeation is with a sorbent, and the efficiency of this process is not certain given the natural ventilation that occurs during use of protective clothing, especially gloves. In this study charcoal cloth was made into gloves and used beneath polyvinylchloride gloves to monitor permeation. The glove system was flexed at rates of 0, 30, or 50 times per minute. The weight loss of the system was monitored as an indicator of the permeation through the glove, and the charcoal gloves were assayed via gas chromatography for the heptane permeant. Under no-flex conditions the charcoal cloth was near 100 percent effective at trapping the heptane. Under conditions of flex, 61 to 86 percent of the heptane was captured. Given the inexact nature of the clothing selection process, these appear to be acceptable results. However, a few other factors, such as the polarity of the permeant, need to be considered.
Keywords
Analytical-processes; Analytical-methods; Analytical-chemistry; Sampling-methods; Sampling; Protective-materials; Protective-clothing
CODEN
AOEHE9
Publication Date
19970501
Document Type
Journal Article
Funding Type
Grant
Fiscal Year
1997
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-T42-CCT-410429
Issue of Publication
5
ISSN
1047-322X
Source Name
Applied Occupational and Environmental Hygiene
State
AL
Performing Organization
Department of Environmental Health Sciences, School of Public Health, University of Alabama at Birmingham, Birmingham, Alabama 35294-0022
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