Hanna Instruments HI 83205-2008 User Manual

Page 25

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.

Iron LR

INTERFERENCES

Interference may be caused by:

Cadmium above 4.0 mg/L

Chromium

above 0.25 mg/L

Chromium

above 1.2 mg/L

Cobalt above 0.05 mg/L

Copper above 0.6 mg/L

Cyanide above 2.8 mg/L

Manganese above 50.0 mg/L

Mercury above 0.4 mg/L

Molybdenum above 4.0 mg/L

Nickel above 1.0 mg/L

Nitrite ion above 0.8 mg/L

Sample pH should be between 3 and 4 to avoid developed color to fade or turbidity formation.