Hach DR2400 - Page 517

Nitrogen, Total Inorganic
Nitrogen, Total Inorganic
NitrogenTI_TNT_Other_TTR_Eng_Ody.fm Page 3 of 6
Interferences
The following ions may interfere when present:
The following do not interfere below the levels listed:
13. Touch the timer icon.
Touch
OK.
A 20-minute reaction
period will begin.
14. Install the 16-mm
adapter.
Note: See Section 2.6 in the
Instrument Manual for
installation details.
When the timer beeps,
wipe the blank and place
it into the adapter.
15. Touch Zero.
The display will show:
0.0 mg/L N
16. Wipe the prepared
sample and place it into
the cell holder.
Touch
Read.
Results will appear in
mg/L N.
Zero
Interfering Substance Interference Levels and Treatments
Calcium Causes a positive interference at 1000 mg/L as CaCO
3
.
Manganese (IV) Causes a negative interference at 3 mg/L.
Magnesium Causes a positive interference at 1000 mg/L as CaCO
3
.
Sulfide Causes a negative interference at 3 mg/L.
Sulfate Causes a negative interference at 250 mg/L.
Substance Levels Tested
Al
3+
8 mg/L
Ba
2+
40 mg/L
Cu
2+
40 mg/L
Fe
3+
8 mg/L
Zn
2+
80 mg/L
F
–
40 mg/L
PO
4
3–
–P 8 mg/L
SiO
2
80 mg/L
EDTA 80 mg/L