Nitrite
Nitrite
Page 2 of 4
Nitrite_UniCell_Low_DAZ_Eng_Ody.fm
Interferences
The ions listed in the table have been tested up to the given concentrations.
Cumulative effects and the influence of other ions have not been evaluated.
Chromium (VI) ions interfere. Copper (II) ions interfere even at concentrations
below 1 mg/L.
Sample Collection, Storage, and Preservation
If prompt analysis is impossible, store sample for 24 to 48 hours at 4 °C (39 °F) or
lower. Warm sample to room temperature before testing. Do not use acid
preservation.
5. Touch the timer icon.
A 10-minute reaction
period will begin. Invert
the sample vial again after
the reaction period has
elapsed.
6. Install the 16-mm cell
adapter.
Note: See Section 2.6 Sample
Cell Adapters in the Instrument
Manual for adapter installation
details.
Wipe the zero vial (white
cap) and place it into the
cell.
7. Touch Zero.
The display will show:
0.000 mg/L NO
2
–
–N
Underrange
8. Wipe the sample vial
and place it into the
celladapter.
Touch
Read.
Results will appear in mg/
L NO
2
–
–N.
Zero
Interfering Substance Interference Levels
Cl
–
, SO
4
2–
2000 mg/L
K
+
, NO
3
–
, Ca
2+
1000 mg/L
NH
4
+
, PO
4
3–
500 mg/L
Mg
2+
100 mg/L
Cr
3+
, Hg
2+
50 mg/L
Co
2+
, Zn
2+
, Cd
2+
25 mg/L
Fe
3+
, Ni
2+
12 mg/L
Ag
+
, Fe
2+
10 mg/L
Sn
2+
5 mg/L
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