Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Development of an SO2 monitor for mobile sources /
Author Burch, D. E. ; Davila, Pamela S. Marrs ; Gates, Francis J. ; Pembrook, John D.
Other Authors
Author Title of a Work
Burch, D. E.
Zweidinger, Roy.
CORP Author Ford Aerospace and Communications Corp., Newport Beach, CA. Aeronutronic Div.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Publisher Environmental Sciences Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1979
Report Number EPA-600/2-79-121
Stock Number PB80-100472
OCLC Number 52581169
Additional Subjects Monitors ; Air pollution ; Sulfur dioxide ; Exhaust emissions ; Design ; Performance evaluation ; Motor vehicles ; Concentration(Composition) ; Ultraviolet spectroscopy ; Absorption spectra ; Laboratory equipment ; Air pollution detection
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EHAM  EPA-600/2-79-121 Region 1 Library/Boston,MA 05/25/2016
EJBD ARCHIVE EPA 600-2-79-121 Headquarters Library/Washington,DC 09/07/2011
EJBD  EPA 600-2-79-121 c.1 Headquarters Library/Washington,DC 04/14/2014
EKBD  EPA-600/2-79-121 Research Triangle Park Library/RTP, NC 07/11/2003
ERAD  EPA 600/2-79-121 Region 9 Library/San Francisco,CA 10/01/2012
ESAD  EPA 600-2-79-121 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB80-100472 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation vii, 43 pages : illustrations ; 28 cm.
An instrument has been designed and built to monitor the concentration of SO2 in the exhaust of mobile sources. A grating assembly disperses the ultraviolet energy from a deuterium-arc source and passes five narrow spectral intervals. Three of the intervals (set A) coincide with strong absorption features in the SO2 band near 3000 A; the other two intervals (set B) coincide with weak absorption. A spinning reticle alternately transmits energy passing through set A and B to a photomultiplier detector. A dc output signal proportional to the concentration of SO2 in the sample cell is produced by appropriate electronics. A pump and manifold assembly permit operation over a wide range of sample flow rates. At high flow rates, the 90% sample turn-over time is approximately 0.7 sec. The sample cell contains a multiple-pass optical system adjusted to 12 passes, giving a sample path length greater than 5 m. The rms noise level corresponds to approximately 0.05 ppm of SO2 when the electronic time constant is 1 sec.
Project Officer: Roy Zweidinger. Ford Aerospace and Communications Corporation "July 1979." "EPA-600/2-79-121."