Nitrogen, Ammonia
Nitrogen, Ammonia
Page 2 of 6
NitrogenAmm_TNT_Low_SAL_Eng_Ody.fm
Interferences
5. Add the contents of
one Ammonia Cyanurate
Reagent Powder Pillow
to each vial.
6. Cap the vials tightly
and shake thoroughly to
dissolve the powder.
7. Touch the timer icon.
Touch
OK.
A 20-minute reaction
period will begin.
8. 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.
9. Touch Zero.
The display will show:
0.00 mg/L NH
3
–N
10. Wipe the sample vial
and place it into the
adapter.
11. Touch Read.
Results will appear in
mg/L NH
3
–N.
Interfering Substance Interference Levels and Treatments
Calcium 2500 mg/L as CaCO
3
Iron
1. Determine the amount of iron present in the sample by using one of the Iron, Total,
procedures.
2. Add the same iron concentration to the ammonia-free water in step 4. The interference will
then be successfully blanked out.
Magnesium 15,000 mg/L as CaCO
3
Nitrite 30 mg/L as NO
2–
–N
Nitrate 250 mg/L as NO
3–
–N
Orthophos-phate 250 mg/L as PO
4
3–
–P
Zero
Read
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