Nitrogen, Ammonia, High Range, Test 'N Tube, Salicylate Method - Hach DR/850 Procedures Manual

NITROGEN, AMMONIA, High Range, Test 'N Tube
(0 to 50 mg/L NH -N)
3
Salicylate Method
1.
Enter the stored
program number for
nitrogen, ammonia, high
range Test 'N Tube
(NH -N) method.
3
Press:
PRGM
The display will show:
PRGM ?
5.
Add the contents of 1
Ammonia Salicylate
Reagent Powder Pillow
for 5 mL Sample to
each vial.
* Adapted from Clin. Chim. Acta, 14 403 (1966).
*
2.
Press:
67 ENTER
The display will show
mg/L, NH3-N and the
ZERO icon.
Note: For alternate forms
(NH ), press the
3
CONC key.
Note: For proof of
accuracy, use a 10-mg/L
nitrogen, ammonia
standard in place of the
sample.
6.
Add the contents of 1
Ammonia Cyanurate
Reagent Powder Pillow
for 5 mL Sample to
each vial.
For water, wastewater, and seawater
3.
Insert the COD/TNT
Adapter into the cell
holder by rotating the
adapter until it drops
into place. Then push
down to fully insert it.
Note: For increased
performance, a diffuser
band covers the light path
holes on the adapter. Do
not remove the diffuser
band.
7.
Cap the vials tightly
and shake thoroughly to
dissolve the powder.
Note: A green color
will develop if ammonia
is present.
271
Method 10031
4.
Remove the caps
from 2 AmVer Diluent
Reagent High Range
Vials. Add 0.1 mL of
sample to one vial (the
sample). Add 0.1 mL of
deionized water to the
other (the blank).
8.
Press:
TIMER ENTER
A 20-minute reaction
period will begin.