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LaMotte 1200 COLORIMETER AMMONIA-NITROGEN User Manual

Page 2

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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

ZERO

button and hold it

for 2 seconds until

bla

is displayed.

Release the button

to take a blank

reading (0.0 ppm).

I200

COLORIMETER

• • • • • • • • • • • • • • • • • •

READ

ZERO

bla

7.

Cap and invert to mix.

Wait 5 minutes for full

color development.

Wipe tube dry.

5

MIN

UTE

S

8.

Align the index line with the

arrow on the meter, insert tube

into chamber.

Close the lid. Push

the

READ

button. Record

results as ppm

Ammonia

Nitrogen (NH

3

-N).

CAL

I200

COLORIMETER

• • • • • • • • • • • • • • • • • •

READ

L Mott

L Mott

Insert the tube into

the chamber, being

Push the READ button

to turn the meter on. Press