7
Ammonia (NH
3
/NH
4
+
) Test Procedure
REMOVE STRIP
Remove one (1)
eXact
®
Strip Micro NH
3
, Part No.
486654-A
from the bottle before beginning the test.
Set the strip in a dry, convenient place and recap
the bottle immediately.
NH
3
NH4
1
2
5
3
7
TURN METER ON
Press the
ZERO/ON
button to power the meter on;
the display will show all annunciators, then the
current MENU selection, followed by the last
reading.
RINSE/FILL CELL & ADD REAGENT
Rinse the
CELL
at least 3 times with the water sample
you will be testing - rinsing minimizes the potential for
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to capacity with the water sample. Add 3 drops of
eXact
®
Reagent NH
3
, Part No. 486654-B
to the
CELL
. For Salt
Water Analysis, add 10 drops.
SELECT TEST: NH4
Press and re-press the
MENU
button until the
display shows the parameter
NH4
.
Dip the
eXact
®
Strip Micro NH
3
, Part No. 486654-A
into the
CELL
and immediately press
READ
. This
starts the
20 SECOND
countdown timer. During
this time move the strip in a gentle back and forth
motion (approx. 2 strokes/sec).
Remove and
discard the strip after “1” on the display
disappears*
. The meter will automatically start to
count up for 500 seconds.
DIP STRIP AND PRESS “READ”
RECORD RESULT DISPLAYED
After the 500 seconds, the cursor will move across the
display while the meter prepares to measure the
sample. Record result displayed as NH
3
concentration
(this result is automatically stored in NH4 Menu). After
testing, rinse cell and clean with brush.
Press the
ZERO/ON
button. The cursor will move
across the display followed by
0.00 PPM
. Sample
is ready for testing.
ZERO METER*
6
*
NOTE: When testing outdoors (sunlight), for best accuracy, use the Mixing Cap/Cell Cover when Zeroing and Reading the sample.
NOTE: Ammonia compounds react with Chlorine to form monochloramine. This reacts with salicylate to form 5-amino salicylate.
This will oxidize in the presence of sodium nitroprusside to form a green color, directly proportional to Ammonia concentration.
(Ammonia Kit 486654 - Reagent and Strips)
4
