Hanna Instruments HI 83218-01 - Manual (Page 22)

22
10 mL
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 34.
MEASUREMENT PROCEDURE
• Select the Chromium VI LR method using the procedure described in the Method Selection section (see
page 11).
• 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.