| Main Title |
Vechicle-Related Hydrocarbon Source Compositions from Ambient Data: The GRACE/SAFER Method. |
| Author |
Henry, R. C. ;
Lewis, C. W. ;
Collins, J. F. ;
|
| CORP Author |
University of Southern California, Los Angeles. Environmental Engineering Program.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. |
| Publisher |
c1994 |
| Year Published |
1994 |
| Report Number |
EPA-R-818410; EPA/600/J-94/309; |
| Stock Number |
PB94-192762 |
| Additional Subjects |
Hydrocarbons ;
Air pollution sampling ;
Chemical composition ;
Reprints ;
Air pollution dispersion ;
Environmental transport ;
Gasoline vapors ;
Evaporative emissions ;
Exhaust emissions ;
Evaporative emission measurement ;
Exhaust emission measurement ;
Gas chromatography ;
Air pollution monitoring ;
Air pollution sources ;
Vehicle air pollution ;
Multivariate analysis ;
Volatile organic compounds ;
GRACE(Graphical Ratio Analysis for Composition Estimates) ;
SAFER(Source Apportionment by Factors with Explicit Restrictions) ;
Graphical analysis
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB94-192762 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
13p |
| Abstract |
The composition of three volatile hydrocarbon sources (emissions from vehicles in motion, evaporation of whole gasoline, and gasoline headspace vapor) have been derived from 550 ambient, hourly concentration measurements of 37 C2-C9 volatile organic compounds (VOC). The source compositions were obtained by a novel combination of graphical analysis and multivariate receptor modeling methodologies: GRACE (Graphical Ratio Analysis for Composition Estimates) and SAFER (Source Apportionment by Factors with Explicit Restrictions). For the relatively unreactive hydrocarbon species, the ambient-derived source compositions were in good agreement with direct source measurements made in Atlanta concurrent with the ambient measurements. The prominence of the whole gasoline profile in the ambient data was an unexpected result. |
| Supplementary Notes |
Pub. in Environmental Science and Technology, v28 n5 p823-831 1994. See also PB92-220656. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Vechicle-Related Hydrocarbon Source Compositions from Ambient Data: The GRACE/SAFER Method. |
| Category Codes |
68A; 99A; 43F; 91A |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/09 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
424432019 |
| Origin |
NTIS |
| Type |
CAT |
