Hanna Instruments HI 83214 Instruction Manual

43OXYGEN DEMAND, CHEMICAL MEDIUM RANGESPECIFICATIONSRange 0 to 1500 mg/L CODResolution 1 mg/LAccuracy ±15 mg/L or ±4 % of reading @ 25 °C, whichever is greaterLight Source Tungsten lamp with narrow band interference filter @ 610 nmMethod Adaptation of the USEPA 410.4 approved method for the COD determination on surfacewaters and wastewaters. Oxidizable organic compounds reduce the dichromate ion(orange) to the chromic ion (green). The amount of chromic ion formed is determined.REQUIRED REAGENTSCode Description Q.ty/test Q.ty/setCOD-MR* Reagent Vial 1 vial 25 vialsDEIONIZED120 Deionized Water 2.0 mL optional*Reagent Vial identification: COD B, white label.Note: Store the unused vials in their container in a cool and dark place.REAGENT SETHI 93754B-25 Reagents for up to 24 testsREQUIRED ACCESSORIESHI 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 shieldFor other accessories see page 68.MEASUREMENT PROCEDUREBefore using the reagent kit carefully read all the instructions and the Manual Safety Data Sheet(MSDS). Pay particular attention to all warnings, cautions and notes. Failure to do so may resultin serious injury to the operator.Reagent Blank Correction: This method requires a reagent blank correction. A single blank vial may be usedmore 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 MR