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25
Ammonia MR
SPECIFICATIONS
Range
0.00 to 10.00 mg/L
Resolution
0.01 mg/L
Accuracy
±0.05 mg/L ±5% of reading
Typical EMC
±0.01 mg/L
Deviation
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
Quantity
HI 93715
A
-0
First Reagent
4 drops (6 drops for seawater)
HI 93715
B
-0
Second Reagent
4 drops (10 drops for seawater)
REAGENT SETS
HI 93715-01
Reagents for 100 tests
HI 93715-03
Reagents for 300 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
• Select the
Ammonia MR method using the procedure described in
the
Method Selection section (see page 12).
• Fill the cuvette with 10 mL of unreacted sample (up to the mark)
and replace the cap.
• Place the cuvette into the holder and close the lid.
• Press ZERO key. The display will show “-0.0-” when the meter is
zeroed and ready for measurement.
AMMONIA MEDIUM RANGE
• Remove the cuvette.
• Add carefully the content of one packet of HI 93755-0 Alkalinity
Indicator Reagent. Replace the cap and shake vigorously for 30
seconds.
Note
: Pay attention not to spill reagent otherwise full color
development may be inhibited.
• Replace the cuvette into the holder and close the lid.
• Press TIMER and the display will show the countdown prior to the
measurement or, alternatively, wait for 2 minutes and press READ. When the timer ends the meter will
perform the reading.
• The instrument displays the results in mg/L of
alkalinity (CaCO
3
)
.
Alkalinity
