Simultaneous collection of particles and gases followed by multielement analysis using nuclear techniques |
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| Authors: | M E Kitto D L Anderson W H Zoller |
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| Institution: | (1) Department of Chemistry and Biochemistry, University of Maryland, 20742 College Park, MD, U.S.A.;(2) Present address: Wadsworth Center for Laboratories and Research, New York State Department of Health, 12201 Albany, NY, U.S.A.;(3) Present address: FDA Laboratory, National Bureau of Standards, Building 235/B125, 20899 Gaithersburg, MD, U.S.A.;(4) Department of Chemistry, University of Washington, 98195 Seattle, WA, U.S.A. |
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| Abstract: | A simple system was constructed for the separation and collection of atmospheric particles and gases. The five-stage sampling train consists of a particle filter followed by four 7LiOH-impregnated filters to collect acidic gases. The treated filters quantitatively collect acidic gas-phase species of B, S, Cl, Br, I, As, Se, Sb and Hg. Simultaneous sampling with activated charcoal-impregnated and 7LiOH-treated filters revealed that B, S, and As species were found only as acidic gases, while the others had both acidic and nonacidic contributions. Concentrations of up to 48 elements on the particle filters and nine elements on the treated filters were determined using instrumental neutron activation analysis and neutron capture prompt  -ray activation analysis. Minimum sampling volume estimates, average filter blank concentrations, and average atmospheric concentrations at College Park, MD and Wallops Island, VA are presented. |
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| Keywords: | Efficiency gas-phase multielement |
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