Hanna Instruments HI 83200C User Manual

Page 35

Iron HR

IRON HIGH RANGE

SPECIFICATIONS

Range

0.00 to 5.00 mg/L

Resolution

0.01 mg/L

Accuracy

±0.04 mg/L ±2% of reading at 25 °C

Typical EMC

±0.01 mg/L

Deviation
Light Source

Tungsten lamp with narrow band interference filter @ 525 nm

Method

Adaptation of the

EPA Phenantroline method 315B, for natural and treated waters.

The reaction between iron and reagents causes an orange tint in the sample.

REQUIRED REAGENTS

Code

Description

Quantity

HI 93721-0

Powder Reagent

1 packet

REAGENT SETS

HI 93721-01 Reagents for 100 tests
HI 93721-03 Reagents for 300 tests
For other accessories see page 128.

MEASUREMENT PROCEDURE

• Select the

Iron HR 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-” the meter is zeroed and ready for measurement.

• Remove the cuvette and add the content of one packet of

HI 93721-0 reagent. Replace the cap and shake until
dissolution is complete.

Iodine

• Reinsert the cuvette into the instrument.

• Press

Timer and the display will show the countdown prior to the measurement or, alternatively, wait

for 2 minutes and 30 seconds and press

Read. When the timer ends the meter will perform the

reading.

• The instrument displays concentration in

mg/L of iodine.

INTERFERENCES

Interference may be caused by: Bromine, Chlorine, Ozone, Oxidized forms of Chromium and Manganese.
In case of water with hardness greater than 500 mg/L CaCO

, shake the sample for approximately 2

minutes after adding the reagent.
In case of water with alkalinity greater than 250 mg/L CaCO

or acidity greater than 150 mg/L CaCO

the color of the sample may develop only partially, or may rapidly fade. To resolve this, neutralize the
sample with diluted HCl or NaOH.

10 mL