Hanna Instruments HI 83208-2008 User Manual

Page 10

10 mL

• 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 93715A-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 the or to access the second level of functions.
• Press the Chem Frm functional key to convert the result in mg/L of ammonia (NH

) and ammonium (NH

• Press the or to go back 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 LR

SPECIFICATIONS

Range

0.00 to 3.00 mg/L

Resolution

0.01 mg/L

Accuracy

±0.04 mg/L ±4% 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 93700A-0

First Reagent

4 drops (6 drops for seawater)

HI 93700B-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 73.

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 ZERO key. The display will show “-0.0-” when the meter is

zeroed and ready for measurement.

AMMONIA LOW RANGE

Ammonia MR

x 4