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Ammonia HR
AMMONIA HIGH RANGE
SPECIFICATIONS
Range
0 to 100 mg/L (as NH
3
-N)
Resolution
1 mg/L
Accuracy
±1 mg/L or ±5 % of reading @ 25 °C, whichever is greater
Light Source
Tungsten lamp with narrow band interference filter @ 420 nm
Method
Adaptation of the
ASTM Manual of Water and Environmental Technology, D1426-92,
Nessler method. The reaction between ammonia and reagents causes a yellow tint in
the sample.
REQUIRED REAGENTS
Code
Description
Q.ty/test
Q.ty/set
HI 93764B-0*
Reagent Vial
1 vial
25 vials
HI 93764-0
Nessler Reagent
4 drops
1 bottle
*
Reagent Vial identification:
A HR
, green label.
Note
: Store the unused vials in their container in a cool and dark place.
REAGENT SET
HI 93764B-25
Reagents for 25 tests
For other accessories see page 68.
MEASUREMENT PROCEDURE
• Select
Ammonia HR
method following one of the procedures described in the “Method Selection” section
(see page 15).
• Remove the cap from a Reagent Vial.
• Add exactly 1.0 mL of sample to the vial, while keeping the
vial at a 45-degree angle.
• Replace the cap and mix by inverting the vial a couple of times. This is the blank.
•
Place the vial into the holder and push it completely down.