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Evaluation of carbon tetrachloride replacement agents for use in testing non-powered organic vapor front-mounted/back-mounted canisters.

Authors
Moyer-ES; Peterson-JA; Calvert-C
Source
NIOSH 1995 Mar; :1-28
Link
NIOSHTIC No.
00227199
Abstract
Potential substitute organic vapor test agents were evaluated for use in certifying front mounted/back mounted canisters. Tests were conducted to identify agents and challenge concentrations which would prove equivalent to the present criteria for carbon- tetrachloride. Potential replacement agents included ethyl-acetate, pentane, n-hexane, and heptane. The most severe test condition was the 85% relative humidity preconditioned canisters test at 20,000 parts per million (ppm), 50% relative humidity, 32 liters per minute, 25 degrees-C and a 12 minute minimum breakthrough time at a 5ppm breakthrough concentration. Ethyl-acetate was eliminated because of its water solubility. Heptane and n-hexane were eliminated because of their lower flammability limits, which limited their challenge concentration test range. The effect of test relative humidity on as received canisters for pentane was minimal. The data for pentane indicated that the breakthrough times for the as received canisters tested at 80% relative humidity, 64 liters per minute, 25 degrees, and a 50 minute breakthrough time at a 5ppm breakthrough concentration was comparable to the carbon- tetrachloride criteria. The authors caution that only NIOSH certified canisters were investigated in this study and that this is a limitation. Additional work is needed to ascertain if pentane can adequately screen sorbents with highly diverse characteristics.
Keywords
NIOSH-Author; Respiratory-protection; Hydrocarbons; Personal-protective-equipment; Respirators; Laboratory-techniques; Adsorbents; Organic-solvents
Publication Date
19950328
Document Type
Other
Fiscal Year
1995
NTIS Accession No.
PB95-241212
NTIS Price
A03
NIOSH Division
DSR
Priority Area
Respirator Research; Respirators
Source Name
Protective Technology Branch, Division of Safety Research, NIOSH, Morgantown, West Virginia, 28 pages, 9 references
State
WV
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