Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Automated Cryogenic Sampling and Gas Chromatographic Analysis of Ambient Vapor-Phase Organic Compounds: System Design.
Author Pleil, Joachim D. ; McClenny, William A. ;
CORP Author Environmental Monitoring Systems Lab., Research Triangle Park, NC.
Year Published 1983
Report Number EPA-600/D-83-035;
Stock Number PB83-193524
Additional Subjects Organic compounds ; Gas analysis ; Gas chromatography ; Design criteria ; Sampling ; Air pollution ; Chemical analysis ; Laboratory equipment ; Volatile organic compounds ; Air pollution detection
Library Call Number Additional Info Location Last
NTIS  PB83-193524 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 15p
An automated system for unattended repetitive sampling and analysis of volatile organic compounds has been designed and a prototype constructed. The sampling/analysis scheme involves reduced temperature preconcentration of analytes from whole air with subsequent thermal desorption and capillary column gas chromatographic analysis. This paper presents the hardware configuration, timing cycles and overall functional integration of the system. The compact sample collection/injection package is described and data are given to show temperature change rates and plateau stability for the various heated and cooled analytic zones. The system is based on modified commercially-available equipment and is ultimately intended for semi-real time monitoring from a manifold or as a centrally located laboratory instrument for analyzing air samples collected in the field.