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RECORD NUMBER: 4 OF 47

OLS Field Name OLS Field Data
Main Title Closed cycle cooler for VOC preconcentration : final report /
Author Smith, Deborah L.
CORP Author Battelle, Columbus, OH.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Publisher U.S. Environmental Protection Agency, Research and Development, Atmospheric Research and Exposure Assessment Laboratory,
Year Published 1993
Report Number EPA/600/R-93/229; EPA-68-DO-0007
Stock Number PB94-130390
Subjects Volatile organic compounds.
Additional Subjects Air pollution monitoring ; Cold traps ; Cryogenics ; Gas chromatography ; Hydrocarbons ; Adsorption ; Closed-cycle cooling systems ; Helium ; Laboratory equipment ; VOC(Volatile Organic Compounds)
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB94-130390 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 1 sheet
Abstract The use of automated gas chromatographs at air quality network monitoring stations to obtain measurements of ambient concentrations of volatile organic compounds (VOCs) has been a goal of EPA's Atmospheric Research and Exposure Assessment Laboratory. Presently, instrument designs require excessive amounts of cryogen to preconcentrate and resolve the more volatile organic compounds. The large consumption of cryogen becomes a major disadvantage when deploying the automated systems in field monitoring studies. In the current work a closed cycle cooling device was evaluated for its capability in replacing or reducing the need of cryogen for operating automated gas chromatographs.
Notes Microfiche.
Place Published Research Triangle Park, NC :
Supplementary Notes Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Corporate Au Added Ent Atmospheric Research and Exposure Assessment Laboratory (U.S.)
PUB Date Free Form {1994}
NTIS Prices PC A03/MF A01
BIB Level m
Cataloging Source OCLC/T
OCLC Time Stamp 20040317131228
Language eng
Origin NTIS
Type MERGE
OCLC Rec Leader 00874nam 2200229Ka 45020