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Improved determination of gaseous divalent mercury in ambient air using KCl coated denuders

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Abstract

An improved method for the determination of gaseous divalent mercury (GDM) in ambient air using KCl coated denuders has been developed and tested. GDM collected in the KCl coated denuders can be quantitatively desorbed at 450 °C in 10 min. After being complete thermally reduced to Hg0 at 900 °C, all mercury released from the denuder is pre-concentrated on the analytical Au trap, and detected by cold vapor atomic fluorescence spectrometry (CVAFS). The absolute detection limit of the method is less than 3 pg. Preliminary data of GDM concentration in ambient air from different sampling stations show that GDM concentrations in the urban air of Göteborg are much higher than in rural air (Rörvik and Sasetta), which indicates the anthropogenic origin of GDM.

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Authors and Affiliations

  1. Inorganic Chemistry, Department of Chemistry, Göteborg University, S 412 96 Göteborg, Sweden e-mail: feng@inoc.chalmers.se, , , , , , SE

    Xinbin Feng, J. Sommar, K. Gårdfeldt & O. Lindqvist

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  1. Xinbin Feng
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  2. J. Sommar
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  3. K. Gårdfeldt
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  4. O. Lindqvist
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Received: 5 July 1999 / Revised: 6 October 1999 / Accepted: 13 October 1999

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Feng, X., Sommar, J., Gårdfeldt, K. et al. Improved determination of gaseous divalent mercury in ambient air using KCl coated denuders. Fresenius J Anal Chem 366, 423–428 (2000). https://doi.org/10.1007/s002160050086

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  • DOI: https://doi.org/10.1007/s002160050086

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