DR/2400
Mercury
Mercury_PP_Other_CVM_Eng_Ody.fm Page 1 of 12
• Perform phase 1 of the procedure in a fume hood. Toxic chlorine or other gases may be produced.
• Use dedicated digestion glassware and sample cells for this procedure.
• Determine a reagent blank for each new lot of reagent by running the entire procedure, including the digestion, using one liter of
deionized water instead of sample. Add the same amount of potassium permanganate as required by the sample. Subtract the
reagent blank value from the final results or perform a reagent blank adjust. See the instrument manual for more information on
Running a Reagent Blank.
(Must be done in a fume hood – toxic gases may be produced!)
Mercury
Method 10065
Cold Vapor Mercury Concentration Method*
* Patent no. 5,733,786
(0.1 to 2.5 µg/L)
Scope and Application: For water, wastewater, and seawater
Tips and Techniques
10 mL
Phase 1: Sample Digestion
!
1. Transfer one liter of
the sample to a 2000-mL
Erlenmeyer flask. Add a
50-mm magnetic stir bar
to the sample. Place the
flask on a magnetic
stirring hot plate and
begin stirring.
2. Add 50 mL of
concentrated sulfuric
acid to the sample.
3. Add 25 mL of
concentrated nitric acid
to the sample.
4. Add 4.0 g of
potassium persulfate to
the sample. Stir until
dissolved.
Alternatively, add one
5-gram measuring scoop
of potassium persulfate to
the sample.
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