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Chromium VI LR
CHROMIUM VI LOW RANGE
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 132.
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
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