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8.18. CHROMIUM (VI) HIGH RANGE
SPECIFICATIONS
Range
0 to 1000 µg/L (as Cr(VI))
Resolution
1 µg/L
Accuracy
±5 µg/L ±4% of reading at 25 °C
Light Source
LED with narrow band interference filter @ 525 nm
Method
Adaptation of the ASTM Manual of Water and Environmental Technology,
D1687, Diphenylcarbohydrazide method.
REQUIRED REAGENTS
Code
Description Quantity
HI93723‑0
Chromium(VI) High Range Reagent
1 packet
REAGENT SETS
HI93723‑01
Reagents for 100 tests
HI93723‑03
Reagents for 300 tests
For other accessories see page 200.
MEASUREMENT PROCEDURE
• Select the
Chromium(VI) HR
method
using the procedure described
in the Method Selection section (see page 18).
• 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.
• Remove the cuvette.
• Add one packet of
HI93723‑0
Chromium(VI) High Range
Reagent. Replace the cap and shake vigorously for about
10 seconds.
10 mL
CHROMIUM (VI) HIGH RANGE