FATE OF MERCURY IN THE ARCTIC Michael Evan ... - COGCI

Fate of Mercury in the Arctic 33
3.5 RGM determination
RGM was measured and analysed by the method developed by Landis et al. (2002). Dr. Landis
along with Dr. Robert Stevens, trained this author on the coating and manual measurements and
desorption technique at the US EPA at Research Triangle Park, prior to going to Barrow Alaska.
The Landis et al., method for RGM determination uses a KCl coated quartz annular denuder
Figure 2. The quartz denuder system from University Research Corporation (URG), North Carolina,
used for the collection of RGM in ambient air. Diagram from URG catalogue. The KCl coating is in
the annulus space, in the grey, sandblasted region. The inlet and outlet was carefully rinsed of KCl,
and the coating was uniform, with no large crystals. Heating mantle not shown.