Authors: D L Dugan R H Filby J T Elliston P T Buckley C S Claiborn
Publish Date: 2007/11/24
Volume: 276, Issue: 1, Pages: 199-205
Abstract
More than 2200 atmospheric particulate matter filters were collected from 1995 through 2002 in the Spokane WA area for the Spokane AirFilters Project The samples were sent to the US EPA in Research Triangle Park NC for energy dispersive Xray fluorescence XRF analysis and then delivered to the Washington State University Nuclear Radiation Center for neutron activation analysis NAA There were 28 elements of interest for the NAA portion of the project however due to detector efficiencies background effects and composition loading on each filter only 15 of the 28 elements analyzed for produced valid results above the detection limit due to Compton background noise and blank subtraction The 15 detectable elements with their six year average with associated 95 confidence interval concentrations in ng/m3 are As 0384±088 K 500±194 La 0051±0251 Na 619±421 Sm 000928±0072 Au 000154±0149 Br 106±15 Ce 0164±0969 Co 00399±0122 Cr 0479±331 Fe 110±227 Sb 0474±164 Sc 00197±000548 Th 0011±00603 and Zn 124±326
Keywords: