Hanna Instruments HI 83200C - Manual (Page 34)

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IODINE
SPECIFICATIONS
Range 0.0 to 12.5 mg/L
Resolution 0.1 mg/L
Accuracy ±0.1 mg/L ±5% of reading at 25 °C
Typical EMC ±0.1 mg/L
Deviation
Light Source
Tungsten lamp with narrow band interference filter @ 525 nm
Method Adaptation of the Standard Methods for the Examination of Water and Wastewater,
18 th edition, DPD method. The reaction between iodine and the reagent causes a pink
tint in the sample.
REQUIRED REAGENTS
Code Description Quantity
HI 93718-0 DPD Reagent 1 packet
REAGENT SETS
HI 93718-01 Reagents for 100 tests
HI 93718-03 Reagents for 300 tests
For other accessories see page 128.
MEASUREMENT PROCEDURE
• Select the Iodine 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 the Zero key. The display will show “-0.0-” when the meter is zeroed and ready for
measurement.
• Remove the cap and add the content of one packet of HI 93718-0
DPD reagent. Replace the cap and shake gently for about
30 seconds to dissolve most of the reagent.
Iodine
• Add 12 drops of the HI 93704-0 reagent to
each cuvette. Replace the caps and shake
gently to mix (about 30 seconds).
• 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 µµµµµ g/L of hydrazine.
Hydrazine
INTERFERENCES
Interference may be caused by:
Highly colored samples
Highly turbid samples
Aromatic amines
# 1 # 2
# 1
# 2
10 mL