Hanna Instruments HI 83200-01 - Manual (Page 41)

80 81 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 128.
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
4
) and
permanganate (MnO
4
).
• 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
3
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
3
Nickel above 40 mg/L
Zinc above 15 mg/L.