Shop a range of Hach products for COD monitoring including COD analyzers, instruments, reagents, and more. Learn what COD is and why it's measured.

Chemical Oxygen Demand - Expert High Range COD test made simple. Recommended COD test for wastewater influent. The Chemical Oxygen Demand analysis provides important information for the water treatment process and is essential to calculate the BOD COD ratio in wastewater.

Expert Mercury free COD test made simple. COD TNTplus ® chemistry and your Hach spectrophotometer are engineered to simplify water analysis for accurate results, everytime. For determination of Chemical Oxygen Demand (COD) by the …

1. Prepare a 10,000 mg/L COD standard solution as follows: a. Dissolve 8.500 g of dried KHP in 1000-mL of organic-free deionized water. 2. Use the test procedure to measure the concentration of the standard solution. 3. Compare the expected result to the actual result.

Chemical oxygen demand (COD) is the amount of dissolved oxygen that must be present in water to oxidize chemical organic materials, like petroleum. COD is used to gauge the short-term impact wastewater effluents will have on the oxygen levels of receiving waters.

The new generation CODmax III COD online detector uses potassium dichromate method for high temperature digestion. The COD detector uses photometry to measure the sample absorbance, and analyzes and determines the linear relationship between absorbance and COD value of …

The EZ Series Online Analysers offer multiple options to monitor Chemical Oxygen Demand (COD) in water. Typical applications are wastewater and surface water. The EZ7000 Series COD Analysers are single-parameter titrators.

Turn on the COD Reactor. Preheat to 150 °C. Place the plastic shield in front of the reactor. Note: Ensure safety devices are in place to ... Hach Customer Service for details. 2 hours Colorimetric or Titrimetric. OXYGEN DEMAND, Chemical OxygenCOD_Other_Other_RCD_Eng_4000.fm Page …

Hach’s COD Method. Hach’s USEPA-approved dichromate COD Method is the most widely used chemical oxygen demand method in the world for NPDES reporting and for easy process monitoring. Chemical Oxygen Demand

The results in mg/L COD are defined as the milligrams of O2 consumed per liter of sample under the conditions of this procedure. The sample is heated for 2 hours with