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Chromium VI LR

SPECIFICATIONS

Range 0 to 300 μg/L

Resolution 1 μg/L

Accuracy ±1 μg/L ±4% of reading at 25 °C

Typical EMC ±1 μg/L

Deviation

Light Source Tungsten lamp with narrow band interference filter @ 525 nm

Method Adaptation of the

ASTM Manual of Water and Environmental Technology, D1687-92

Diphenylcarbohydrazide method. The reaction between chromium VI and the reagent

causes a purple tint in the sample.

REQUIRED REAGENTS

Code Description Quantity

HI 93749-0 Powder reagent 1 packet

REAGENT SETS

HI 93749-01 Reagents for 100 tests

HI 93749-03 Reagents for 300 tests

For other accessories see page 66.

MEASUREMENT PROCEDURE

• Select the

Chromium VI LR

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 meter will show “-0.0-” when the meter is zeroed and ready for

measurement.

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

HI 93749-0 reagent. Replace the cap and shake vigorously

for about 10 seconds.

10 mL

CHROMIUM VI LOW RANGE

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 67 68

Brak uwag

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