Record Display for the EPA National Library Catalog
RECORD NUMBER: 636 OF 1548
|OLS Field Name||OLS Field Data|
|Main Title||Evaluation of an EPA high-volume air sampler for polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans.|
|Author||DeRoos, F. L. ; Tabor, J. E. ; Miller, S. E. ; Watson, S. C. ; Hatchel, J. A.|
|CORP Author||Battelle Columbus Div., OH.;Environmental Monitoring Systems Lab., Research Triangle Park, NC.|
|Publisher||Environmental Monitoring Systems Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,|
|Report Number||EPA/600/4-86/037; EPA-68-02-4127|
|Subjects||Air--Pollution--Measurement ; Organochlorine compounds|
|Additional Subjects||Air pollution control equipment ; Concentration(Composition) ; Performance ; Design ; Silica gel ; Air samplers ; Polychlorinated dibenzofurans ; Polychlorinated dibenzodioxins|
|Collation||vii, 27 p. ; 28 cm.|
A High-Volume air sampler was evaluated for collection of poly-chlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF). The sampler consists of a filter, polyurethane foam adsorbent cartridge, air pump, and environmental housing. The use of an alternative adsorbent, silica gel, was also studied. The study was carried out using 1,2,3,4-tetra-chlorodibenzo-p-dioxin, 1,2,4,8-tetrachlorodibenzofuran, 1,2,3,4,7,8-hexachlorodibenzo-p-dioxin 1,2,3,6,7,8-hexachlorodibenzofuran, octachlorodibenzo-p-dioxin, and octachlorodibenzofuran. The overall average retention efficiency for all of the isomers at two concentration levels was 99 percent for both the PUF and the silica gel adsorbents. The desorption efficiency of the PCDD/PCDF isomers from spiked filters was evaluated to assess the extent of migration of these compounds from the filter to the adsorbent. Migration was dependent upon the isomers' chlorination level with the less chlorinated, more volatile isomers generally desorbing more efficiently.
"December 1986" "Contract Number 68-02-4127"