Nitrite
Nitrite
Page 2 of 4
Nitrite_TNT_Low_DAZ_Eng_Ody.fm
Interferences
Sample Collection, Storage, and Preservation
Collect samples in clean plastic or glass bottles. Store at 4 °C (30 °F) or lower if
the sample is to be analyzed within 24 to 48 hours. Warm to room temperature
before running the test.
5. When the timer beeps,
fill an empty Test ‘N
Tube™ vial with 5 mL of
sample (this is the blank).
6. Install the 16-mm
adapter.
Note: See Section 2.6 in the
Instrument Manual for
installation details.
Wipe the blank and place it
into the adapter.
7. Touch Zero.
The display will show:
0.000 mg/L NO
2
–
–N
8. Place the prepared
sample cell into the cell
holder.
Touch
Read.
Results will appear in mg/
L NO
2
–
–N.
Interfering Substance Interference Levels and Treatments
Antiminous ions Interfere by causing precipitation
Auric ions Interfere by causing precipitation
Bismuth ions Interfere by causing precipitation
Chloroplatinate ions Interfere by causing precipitation
Cupric ions Cause low results
Ferric ions Interfere by causing precipitation
Ferrous ions Cause low results
Lead ions Interfere by causing precipitation
Mercurous ions Interfere by causing precipitation
Metavanadate ions Interfere by causing precipitation
Nitrate
Very high levels of nitrate (>100 mg/L nitrate as N) appear to undergo a slight amount of
reduction to nitrite, either spontaneously or during the course of the test. A small amount of
nitrite will be found at these levels.
Silver ions Interfere by causing precipitation
Strong oxidizing and
reducing substances
Interfere at all levels
Zero
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