HI93754 COD Chemical Oxygen Demand Pre-dosed Reagent Set 13 mm Vial Eight dierent kits to satisfy every need • COD levels vary depending on the application and process measuring points. Hanna offers reagents to cover three separate ranges: · Low Range: 0 to 150 mg/L O± · Medium Range: 0 to 1500 mg/L O± · High Range: 0 to 15000 mg/L O± · Ultra High Range: 0 to 60000 mg/L O± Pre-dosed vials • Each Hanna vial contains the exact amount of pre-dosed reagent needed for the analysis. The operator just needs to add a small quantity of the sample. Safe reagents • Hanna COD reagents are safe for operators and the environment. Vials and caps have been designed to avoid accidental reagent spills. Due to the pre-dosed reagents, the amount of chemicals and handling time is minimized. Quick and accurate measurements • With pre-dosed vials, test preparation time is dramatically reduced. There is no time-consuming reagent preparation procedure or glassware cleaning. Compact packaging • Each set of COD vials is stored in fully recyclable, sustainable, compact plastic packaging rather than standard styrofoam. The ergonomic box design reduces the volume of collateral waste and required storage space. • The procedure guide is printed on the inside lid. Signicance and use Chemical Oxygen Demand (COD) is a measure of the biologically available and inert oganic matter that is susceptible to oxidation by a strong oxidizing agent. The Hanna COD method is based on the well established closed dichromate-re³ux colorimetric method. The colorimetric measurement of COD is faster and easier to perform than the titrimetric analysis; additional reagents are not required. The sample is added to the reagent vial and digested under closed re³ux conditions and allowed to cool before measurement is taken. Reference standards can be made using potassium hydrogen phthalate (KHP), 1 mg of KHP is equal to 1.175 mg COD. The US Environmental Protection Agency (EPA) species that the dichromate re³ux method is the only method acceptable for reporting purposes. The advantage in using this method includes certiable results as well as high accuracy. Application COD is used as a measurement of pollutants. It is normally measured in both municipal and industrial wastewater treatment plants and gives an indication of the e´ciency of the treatment process. COD is measured on both in³uent and eÇuent water. The e´ciency of the treatment process is normally expressed as COD removal, measured as a percentage of the organic matter puried during the cycle. COD has further applications in power plant operations, chemical manufacturing, commercial laundries, pulp and paper mills, agriculture and animal waste runo, environmental studies and general education. Hanna equipment can be used in the laboratory or for on-site testing. The measurement procedure has been designed for ease of use by personnel at any skill level. Method Hanna COD reagents have been developed in accordance with Standard Methods 5220D, US EPA 410.4 and ISO 15705 methods. Procedure guides on inside lid 11 COD and Vials 11.22 | www.hannainst.com Pre-dosed Reagents
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