Hanna Instruments HI 83200C User Manual

Page 14

Ammonia LR

SPECIFICATIONS

Range

0.00 to 3.00 mg/L

Resolution

0.01 mg/L

Accuracy

±0.04 mg/L ±4% of reading at 25 °C

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 93700

A-0

First Reagent

4 drops (6 drops for seawater)

HI 93700

B-0

Second Reagent

4 drops (10 drops for seawater)

REAGENT SETS

HI 93700-01 Reagents for 100 tests
HI 93700-03 Reagents for 300 tests
For other accessories see page 128.

MEASUREMENT PROCEDURE

• Select the

Ammonia LR 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 the

Zero key. The display will show “-0.0-” when the meter is zeroed and ready for

measurement.

AMMONIA LOW RANGE

• Remove the cuvette.

• Add 4 drops of HI 93715A-0 First Reagent (6 drops for

seawater analysis). Replace the cap and mix the solution.

• Add 4 drops of HI 93715B-0 Second Reagent (10 drops for

seawater analysis). Replace the cap and mix the solution.

• Reinsert the cuvette into the instrument.
• Press

Timer and the display will show the countdown prior to the

measurement or, alternatively, wait for 3 minutes and 30 seconds
and press

Read. When the timer ends the meter will perform the

reading. The instrument displays the results in

mg/L of ammonia

nitrogen (NH

-N).

• Press ▲ or ▼ to access the second level functions.
• Press the

Chem Frm key to convert the result in mg/L of ammonia (NH

) and ammonium (NH

• Press ▲ or ▼ to return to the measurement screen.

INTERFERENCES

Interference may be caused by:
acetone, alcohols, aldehydes, glycine, hardness above 1 g/L, iron, organic chloramines, sulfide, various
aliphatic and aromatic amines.

Ammonia MR

10 mL