Hanna Instruments HI 83208-2008 User Manual

Page 22

Molybdenum

MOLYBDENUM

SPECIFICATIONS

Range

0.0 to 40.0 mg/L

Resolution

0.1 mg/L

Accuracy

±0.3 mg/L ±5% of reading

Typical EMC

±0.1 mg/L

Deviation
Light Source

Tungsten lamp with narrow band interference filter @ 420 nm

Method

Adaptation of the mercaptoacetic acid method. The reaction between molybdenum and
the reagents causes a yellow tint in the sample.

REQUIRED REAGENT

Code

Description

Quantity

HI 93730A-0

Reagent A

1 packet

HI 93730B-0

Reagent B

1 packet

HI 93730C-0

Reagent C

1 packet

REAGENT SETS

HI 93730-01 Reagents for 100 tests
HI 93730-03 Reagents for 300 tests
For other accessories see page 73.

MEASUREMENT PROCEDURE

• Select the

Molybdenum 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.

Manganese LR

• Press READ to start the reading. The instrument displays the results in µg/L of manganese.

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

) and

permanganate (MnO

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

Note: a temperature above 30°C may cause turbidity. In this case, before zeroing and taking readings,
add 2-3 drops of Dispersing Agent (HI 93703-51) to each cuvette and swirl until turbidity is removed

INTERFERENCES

Interference may be caused by:
Aluminum above 20 mg/L
Cadmium above 10 mg/L
Calcium above 200 mg/L as CaCO

Cobalt above 20 mg/L
Copper above 50 mg/L
Iron above 10 mg/L
Lead above 0.5 mg/L
Magnesium above 100 mg/L as CaCO

Nickel above 40 mg/L
Zinc above 15 mg/L.