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Received for review June 18,1984. Accepted December 14,1984.
Composition of Fine Particle Regional Sulfate Component in Shenandoah Valley Semra G. Tuncel, Ilhan Olmez, Josef R. Parrlngton,t and Glen E. Gordon’ Department of Chemistry, University of Maryland, College Park, Maryland 20742 Robert K. Stevens
Environmental Science Research Laboratory, U.S. Environmental Research Agency, Research Triangle Park, North Carolina 277 11
W Fine fractions of atmospheric particulate samples col-
lected over 3 weeks in July/Aug 1980 in Shenandoah Valley, VA, and previously analyzed by X-ray fluorescence were reanalyzed by instrumental neutron activation analysis to provide data for many additional elements. Modified factor analysis of the combined data yielded a regional sulfate component containing S, NH4+,V, Mn, Zn, Se, As,In, Sb, and Pb. If the component originates mainly from coal combustion, there is modification of the elemental composition pattern during transport from distant power plants to the receptors, even in the
