Hanna Instruments HI 83218-01 - Manual (Page 16)

16
SPECIFICATIONS
Range 0.0 to 50.0 mg/L
Resolution 0.1 mg/L
Accuracy ±0.5 mg/L ±5% of reading at 25 °C
Typical EMC ±0.1 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 93733A-0 Nessler Reagent 4 drops (in fresh and seawater)
HI 93733B-0 Ammonia Reagent 9 mL (in fresh and seawater)
REAGENT SETS
HI 93733-01 Reagents for 100 tests
HI 93733-03 Reagents for 300 tests
For other accessories see page 34.
MEASUREMENT PROCEDURE
• Select the Ammonia HR method using the procedure described in the
Method Selection section (see page 11).
• Fill a cuvette with 1 mL of unreacted sample, by means of the
syringe.
• Add 9 mL of HI 93733B-0 Ammonia Reagent, by means of the 3 mL
plastic pipette. Place the cap and swirl the solution to mix.
• Place the cuvette into the holder and close the lid.
• Press the Zero key. The display will show “-0.0-” when the meter is zeroed and ready for measurement.
AMMONIA HIGH RANGE
Ammonia HR
1 mL
9 mL