Sampling and determination of gas phase divalent mercury in the air using a KCl coated denuder |
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| Authors: | Z Xiao J Sommar S Wei and O Lindqvist |
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| Institution: | (1) Department of Inorganic Chemistry, Chalmers University of Technology and University of G?teborg, S-412 96, G?teborg, Sweden, SE |
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| Abstract: | KCl coated denuders were employed for the measurement of divalent mercury (Hg2+) species in the air. Laboratory tests show that gaseous Hg2+ can be collected by the denuder with an average efficiency of 98% and elemental Hg will pass through it freely. Hg2+ trapped in the denuder can be quantitatively extracted by 1 mol/L HCl and analyzed by the method of SnCl2 reduction-CVAFS determination. Hg2+ concentrations of 0.04–0.15 ng m–3 corresponding to about 2–9% of the total gaseous mercury in the ambient air were determined at several sampling locations.
Received: 24 September 1996 / Revised: 14 January 1997 / Accepted: 18 January 1997 |
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