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Nitrate
Zero
5.
Touch
.
Zero
The display will show:
–
0.0 mg/L NO
–N
3
9.
Within five minutes
after the timer beeps,
wipe the prepared
sample and place it into
the cell holder.
Interferences
Interfering Substance
Barium
Chloride
Nitrite
Copper
Nitrate
Page 2 of 4
6.
Remove the vial from
the instrument. Using a
funnel, add the contents
of one NitraVer X
Reagent B Powder Pillow
to the vial.
Read
10.
Touch
.
Read
Results will appear in
–
mg/L NO
–N.
3
A negative interference at concentrations greater than 1 mg/L.
Does not interfere below 1000 mg/L.
A positive interference at concentrations greater than 12 mg/L. Remove nitrite interference up to
100 mg/L by adding 400 mg (one full 0.5 g Hach measuring spoon) of Urea (Cat. No. 11237-26)
to 10 mL of sample. Swirl to dissolve. Proceed with the nitrate test as usual.
Positive at all levels.
7.
Cap and invert ten
times to mix (this is the
prepared sample).
Some solid matter will
not dissolve.
Interference Levels and Treatments
8.
Touch the timer icon.
Touch
.
OK
A five-minute reaction
period will begin. Do not
invert the vial again.
A yellow color will
develop if nitrate is
present.
Nitrate_TNT_High_CHA_Eng_Ody.fm
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