| 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 |
|
| 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 |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EHAM |
EPA-600/2-79-121 |
|
Region 1 Library/Boston,MA |
05/25/2016 |
| 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 |
| ELBD ARCHIVE |
EPA 600-2-79-121 |
Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
| 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 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
vii, 43 pages : illustrations ; 28 cm. |
| Abstract |
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. |
| Notes |
Project Officer: Roy Zweidinger. Ford Aerospace and Communications Corporation "July 1979." "EPA-600/2-79-121." |
