Mercury
Mercury
Mercury_PP_Other_CVM_Eng_Ody.fm Page 7 of 12
Interferences
Standards were used to prepare a single test solution with the following matrix.
A second test solution containing only mercury at the same concentration was
prepared as the control. The two solutions were digested then analyzed
concurrently. There was no interference from the matrix of the test solution at the
concentrations listed:
In addition, no interference occurred with a test solution containing 1000 mg/L
Na
+
, 1000 mg/L K
+
, 1000 mg/L Mg
2+
, and 400 mg/L Ca
2+
.
5. During the reaction
period, transfer the
solution to a sample cell.
Wipe the sample cell
sides with a clean tissue.
Do not cap the sample
cell.
6. After the timer beeps,
place the prepared
sample into the cell
holder.
7. Touch Zero.
The display will show:
0.1 µg/L Hg
(This program uses a
non-zero intercept.)
8. Remove the cell from
the cell holder. Add the
contents of one HgEx
Reagent 6 foil pillow to
the solution. Swirl or
invert the cell until the
reagent is completely
dissolved. Immediately
go to step 9.
Do not use the funnel to
add HgEx Reagent 6 to the
sample cell. Any HgEx
Reagent 6 in the funnel
will make mercury
undetectable in
subsequent tests.
9. Return the sample
cell to the cell holder.
10. Touch Read.
Results will appear in
µg/L Hg.
10 mL
10 mL
Zero
10 mL
Read
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