Hanna Instruments HI 83200-01 User 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
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 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.
10 mL
Iodine
• 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