Analysis of inorganic mercury species associated with airborne particulate matter/aerosols: method development |
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| Authors: | Xinbin?Feng Email author" target="_blank">Julia?Y?LuEmail author D?Conrad?Grègoire Yingjie?Hao Catharine?M?Banic William?H?Schroeder |
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| Institution: | (1) Department of Chemistry, Biology and Chemical Engineering, Ryerson University, 350 Victoria Street, Toronto, ON M5B 2 K3, Canada;(2) Analytical Chemistry Research Laboratories, Geological Survey of Canada, 601 Booth Street, Ottawa, ON K1A 0E8, Canada;(3) Air Quality Processes Research Division, Meteorological Service of Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, Canada |
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| Abstract: | This paper describes a method for speciation of Hg associated with airborne particulate matter. This method uses a mini-sampler for sample collection and analysis, thermal desorption for separating Hg species, and inductively coupled plasma mass spectrometry (ICP–MS) for identification and quantification of Hg. Coal fly ash spiked with different Hg compounds (e.g. Hg0, HgCl2, HgO, and HgS) was used for qualitative calibration. A standard reference material with a certified value for Hg concentration was used to evaluate the method. When the temperature of the furnace was programmed at a linear rate of increase of 50° min–1, different Hg compounds could clearly be separated. Three airborne particulate matter samples were collected in parallel in Toronto, ON, Canada and analyzed using this method. Reproducible results were obtained and Hg0, HgCl2, HgO, and HgS species from these samples were detected. |
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| Keywords: | Mercury Speciation Airborne particulate matter ICP– MS Thermal desorption |
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