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foreword

Chemical oxygen demand (COD) has always been a reliable and timely comprehensive indicator for measuring organic pollutants in wastewater

Definition and Relevance of Chemical Oxygen Demand

According to USEPA method 5220 D, COD is the oxygen consumption of oxidizable species in water with the mass of potassium dichromate participating in the reaction

As a comprehensive parameter of organic pollution, COD is an indispensable parameter in wastewater analysis

Its fast reliability and reproducibility of measurement results make it stand out, significantly better than biological oxygen consumption (BOD)

Analysis of COD by Colorimetric Test Tube

in principle

The Ohaus preformed tube COD test is based on the same reaction principle as the standard

Efficient measurement and occupational safety

Colorimetric determination of COD is not difficult

The closed tube was then heated in a dry digester at 165°C for 20 minutes

high quality results

The results of the Ohaus prefabricated pipe COD test were consistent with the results of the standard method

Regardless of whether operating or standard methods are used, a prerequisite for identifying measurement results is always the implementation and documentation of QA/QC measures, i.

cost

A cost comparison between the operational analysis and the standard analysis shows that there is a clear advantage to using the Ohaus COD prefabricated pipe test for COD measurements

in conclusion

COD remains one of the most important parameters in wastewater analysis

• Complies with standard method HJ/T 399-2007, EPA 40 CFR 136.

• Reliable and accurate measurement results

• Improve efficiency and reduce workload

• Improve occupational safety and protect laboratory operators

• Economical

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