The sample is preserved with BrCl and Hg is oxidized to Hg(II). NH2OH*HCl is added to the sample to remove any free halogens. Finally, SnCl2 is added to reduce Hg(II) to Hg(0). With the help of carrier gas (Argon), Hg(0) is brought into the system, where it is enriched and purified on two different gold traps. The detection is then performed with Cold Vapor Atomic Fluorescence Spectrometry (CVAFS).
No problems reported.
Valid since January 2025
Method: US EPA Method 1631:2002 revision E.
Instrument: Tekran, 2600-IVS
Accredited mercury analyzes on water samples were until 31 December 2024 performed by IVL Swedish Environmental Research Institute. The method used was CVAFS.
For more information see IVL Swedish Environmental Research Institute's web page about water analysis.
Read more about mercury on Wikipedia.