Hanna-instruments HI 83266 Uživatelský manuál stáhnout pdf (Strana 12)

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Bromine

BROMINE

SPECIFICATIONS

Range 0.00 to 10.00 mg/L

Resolution 0.01 mg/L

Accuracy ±0.08 mg/L ±3% 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

Standard Methods for the Examination of Water and Wastewater,

edition

, DPD method. The reaction between bromine and the reagent causes a

pink tint in the sample.

REQUIRED REAGENTS

Code Description Quantity

HI 93716-0 DPD Reagent 1 packet

REAGENT SETS

HI 93716-01 Reagents for 100 tests

HI 93716-03 Reagents for 300 tests

For other accessories see page 46.

MEASUREMENT PROCEDURE

• Select the

Bromine

method using the procedure described in the

Method Selection

section (see page 15).

• 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.

Bromine

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

HI 93716-0 DPD reagent. Replace the cap and shake

gently for about 20 seconds to dissolve most of the

reagent.

• 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 the results in mg/L of bromine.

INTERFERENCES

Interference may be caused by: Chlorine, Iodine, 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

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