Hanna Instruments HI 83205-2008 User Manual

Page 10

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 93715A-0

First Reagent

4 drops (6 drops for seawater)

HI 93715B-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 73.

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

Aluminum

• Add the content of one packet of HI 93712C-0 Bleaching

Powder to one of the two cuvettes. Replace the cap and
shake vigorously until completely dissolved. This is the blank.

• Place the blank into the holder and close the lid.

• Press TIMER and the display will show the countdown prior to

zeroing the blank. Alternatively wait for 15 minutes and then press
ZERO. The display will show "-0.0-" when the meter is zeroed and
ready for measurement.

• Remove the blank and insert the other cuvette into the instrument.
• Press the READ key and the meter will perform the reading. The

instrument displays the results in mg/L of aluminum.

• Press the or to access the second level of functions.
• Press the Chem Frm functional key to convert the result in mg/L of Al

• Press the or to go back to the measurement screen.

INTERFERENCES

Interference may be caused by:
Iron above 20 mg/L

Alkalinity above 1000 mg/L

Phosphate above 50 mg/L

Fluoride must be absent

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