LaMotte 1200 Colorimeter - Manual (Page 70)

AMMONIA NITROGEN TEST PROCEDURE:
NESSLER METHOD
Read the 1200 Colorimeter Manual before proceeding. Carefully
wipe tubes dry before inserting into the colorimeter chamber.
AMMONIA NITROGEN
2
sure to align
the index line
with the
arrow on the
meter. Close
the lid. This
tube is the
blank or zero.
3.
Rinse and fill a
colorimeter
tube (0290) to
the 10 mL line
with sample
water. Cap and
wipe dry.
2.
Fill the Water
Sample Collecting
Bottle (0688) with
sample water. This
will be used to
dispense sample
water for the tests.
1.
6.
Use 1.0 mL
pipet (0354) to
add 1.0 mL of
*Ammonia
Nitrogen
Reagent #2
(V-4798).
5.
Remove tube from
colorimeter.
Add 8 drops of
Ammonia Nitrogen
Reagent #1 (V-4797).
Cap and mix.
4.
the
button and hold it
for 2 seconds until
is displayed.
Release the button
to take a blank
reading (0.0 ppm).
ZERO
bla
I200
COLORIMETER
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READ
ZERO
bla
7.
Cap and invert to mix.
Wait 5 minutes for full
color development.
Wipe tube dry.
5
MINUTES
8.
Align the index line with the
arrow on the meter, insert tube
into chamber.
Close the lid. Push
the
button. Record
results as ppm
Ammonia
Nitrogen (NH -N).
READ
3
CAL
I200
COLORIMETER
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READ
L Mott
L Mott
Insert the tube into
the chamber, being
Push the button
to turn the meter on. Press
READ