Hanna Instruments HI 83214 - Manual (Page 40)

40
OXYGEN DEMAND, CHEMICAL LOW RANGE
SPECIFICATIONS
Range 0 to 150 mg/L COD
Resolution 1 mg/L
Accuracy ±5 mg/L or ±5 % of reading @ 25 °C, whichever is greater
Light Source Tungsten lamp with narrow band interference filter @ 420 nm
Method Adaptation of the USEPA 410.4 approved method for the COD determination on surface
waters and wastewaters. Oxidizable organic compounds reduce the dichromate ion
(orange) to the chromic ion (green). The amount of remaining dichromate is determined.
REQUIRED REAGENTS
Code Description Q.ty/test Q.ty/set
COD-LR* Reagent Vial 1 vial 25 vials
DEIONIZED120 Deionized Water 2.0 mL optional
* Reagent Vial identification: COD A, red label.
Note: Store the unused vials in their container in a cool and dark place.
REAGENT SET
HI 93754A-25 Reagents for up to 24 tests
REQUIRED ACCESSORIES
HI 839800-01 Hanna reactor (115 VAC)
HI 839800-02 Hanna reactor (230 VAC)
HI 740216
Test tube cooling rack (25 holes)
HI 740217 Laboratory bench safety shield
For other accessories see page 68.
MEASUREMENT PROCEDURE
Before using the reagent kit carefully read all the instructions and the Material Safety Data Sheet
(MSDS). 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 (room temperature). For most accurate measurement,
run a blank for each set of measurements and always use the same lot of reagents for blank and samples.
COD LR