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Chemical Oxygen Demand Ultra High Range
7.4. CHEMICAL OXYGEN DEMAND ULTRA HIGH RANGE
REQUIRED REAGENTS
Code
Description
Quantity
HI93754J‑0
*
COD Ultra High Range Reagent Vial
2 vials
DEIONIZED120
Deionized Water
0.1 mL
REAGENT SETS
HI93754J‑25
Reagents COD Ultra High Range for 25 tests
* Reagent vial identification:
COD J, blue label
For other accessories see Accessories section.
Note
: Store the unused vials in their packaging in a cool and dark place.
MEASUREMENT PROCEDURE
Before using the reagent kit carefully read all the instructions and the Safety Data Sheets (SDS).
Pay particular attention to all warnings, cautions and notes. Failure to do so may result in serious
injury to the operator.
Reagent Blank Correction:
This method requires a reagent blank correction. A single blank vial may be
used more than once. The blank vial is stable for several months at room temperature. For improved accuracy
measurement, run a blank for each set of measurements and always use the same lot of reagents for blank
and samples.
• Choose a homogeneous sample. Samples containing solids capable of settling need to be homogenized
with a blender.
• Preheat the Hanna
®
Reactor
HI839800
to 150 °C (302 °F). Use of the optional
HI740217
safety shield
is strongly recommended. Do not use an oven or microwave, samples may leak and generate a corrosive
and possibly explosive atmosphere.
• Remove the cap from two COD Ultra High Range Reagent vials.
#1
#2
• Add 0.1 mL of deionized water to the first vial (#1) and 0.1 mL of sample to the second vial (#2), while
keeping the vials at a 45‑degree angle. Replace the caps and invert several times to mix.
Warning
: The vials will become hot during mixing, use caution when handling.
DI water
#1
Blank
45°
Sample
#2
Sample
45°
#1
Blank
#2
Sample