Hanna Instruments HI 83200C User Manual

Page 34

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,

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