Particulate sulfur analysis: Application to high time resolution aircraft sampling in plumes |
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| Affiliation: | 1. Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing 100124, China;2. School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China;3. State Environmental Protection Key Laboratory of Food Chain Pollution Control, Beijing Technology and Business University, Beijing 100048, China;1. University of Maryland Center for Environmental Science, Chesapeake Bay Program Office, Annapolis, MD 21403, USA;2. University of Maryland Center for Environmental Science, Appalachian Laboratory, Frostburg, MD 21532, USA;3. U.S. Environmental Protection Agency, Washington D.C. 20004, USA |
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| Abstract: | Application of vaporization flame-photometric detector (FPD) method for analysis of submicrogram amounts (> 0.3 μg) of atmospheric particulate sulfur for samples collected in plumes is described. Aerosol is deposited on a portion (0.3 cm2) of a light weight, low pressure drop glass-fiber filter with a consistent, low sulfur blank of 0.36–0.5μg cm−2. Water extracts are analyzed for sulfur with a precision of 2.5%, while the precision of the entire analytical procedure is estimated to be 5%. The aerosol sampling is performed with a sequential two-stage tape sampler which separates the ambient aerosol in coarse (>3 μm) and fine (<3 μm) size ranges. The sampling time required by the method is 7 min for plume sulfur concentrations of 3 μg m−3. It was found feasible to measure the average sulfur concentration obtained during a single traverse across a large plume. The method has been used for aerosol sampling and sulfur analysis of samples collected in power plant and urban-industrial plumes in the St. Louis area. |
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