East versus West in the US: Chemical Characteristics of PM2.5during the Winter of 1999

Autor:	Michael P. Tolocka, Robert W. Vanderpool, William J. Mitchell, Russell W. Wiener, James B. Homolya, Joann Rice, Gary A. Norris, Paul A. Solomon, David B. Gemmill
Rok vydání:	2001
Předmět:	Ion chromatography Analytical chemistry Mineralogy chemistry.chemical_element Pollution Sulfur Aerosol Ion chemistry.chemical_compound chemistry Nitrate Environmental Chemistry General Materials Science Ammonium Sulfate Chemical composition
Zdroj:	Aerosol Science and Technology. 34:88-96
ISSN:	1521-7388 0278-6826
DOI:	10.1080/02786820118957
Popis:	The chemical composition of PM2.5 was investigated at four sites (Rubidoux, CA, Phoenix, AZ, Philadelphia, PA, and Research Triangle Park, NC) in January and February of 1999. Three samplers were used to determine both the overall mass and the chemical composition of the aerosol. Teflon filters were weighed for total mass. Ions were analyzed using ion chromatography. Elements were determined using X-ray fluorescence. Organic and elemental carbon were measured using a thermo-optical method. At all of the sites, reconstructed mass was observed to be greater than or equal to the measured mass. Good ionic balance was found for ammonium, nitrate, and sulfate at each of the sites. Overall, the chemical composition of the aerosol for each site was in good agreement with the expected composition based upon previous studies, with the exception of relatively high nitrate contribution to the total mass at Philadelphia. Good agreement was found between the predicted amount of sulfate by XRF analysis of sulfur and the...
Databáze:	OpenAIRE
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