Hanna Instruments HI 83212 - Manual (Page 17)

32 33 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 50.
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.
• Add 12 drops of the HI 93704-0 reagent to each
cuvette. Replace the caps and shake gently to mix.
• Place the blank (#1) into the holder and close the lid.
• Press TIMER and the display will show the countdown
prior to zeroing the blank. The display will show “-0.0-”
when the meter is zeroed and ready for measurement.
• Remove the blank.
• Insert the cuvette with the reacted sample (# 2) into the
instrument and close the lid.
• Press READ to start the reading. The instrument displays
concentration in µg/L of hydrazine.
Hydrazine
x 12
# 1 # 2
x 12
# 1
# 2
INTERFERENCES
Interference may be caused by:
Highly colored samples
Highly turbid samples
Aromatic amines