||Determination of C2 to C12 ambient air hydrocarbons in 39 U.S. cities from 1984 through 1986
Seila, R. L. ;
Lonneman, W. A. ;
Meeks, S. A.
||Computer Sciences Corp., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
||U.S. Environmental Protection Agency, Office of Research and Development, Atmospheric Research and Exposure Assessment Laboratory,
Hydrocarbons--Air content--Measurement--United States
Gas analysis ;
Information systems ;
Urban areas ;
Experimental data ;
Gas chromatography ;
United States ;
Air pollution sampling ;
Air pollution detection ;
Data base management ;
Environmental monitoring ;
National Ambient Air Quality Standard
||Research Triangle Park Library/RTP, NC
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||1 v. (various pagings) : ill. ; 28 cm.
Currently more than 60 urban areas are not in compliance with the National Ambient Air Quality Standard (NAAQS) for ozone. The use of photochemical models will be necessary to forecast the nonmethane organic compound (NMOC) reductions needed to attain the NAAQS. These models require knowledge of the individual organic species in ambient air. To this end, speciated hydrocarbons were determined in over 800 ambient air samples obtained from 39 U.S. cities during 1984, 1985, and 1986. Whole-air samples were collected in electropolished, stainless steel spheres on weekdays from 6 to 9 A.M. during June through September each year. Two gas chromatographic (GC) procedures with cryogenic sample preconcentration were employed to separate and measure C2 to C12 hydrocarbon species. Menu driven software was developed to transfer GC data to a personal computer. The 48 compounds seen in highest concentration consisted of 25 paraffins, 15 aromatics, 7 olefins, and acetylene. Sample concentrations of the 64 most abundant species are reported.
EPA Project Officer: Robert L. Seila. "March 1989." "EPA/600/3-89/058." Includes bibliographical references (p. 13)