The 2-Minute Rule for COD testing

Quickly invert Just about every vial ten situations though Keeping the vial from the cap only because the vial will be warm with the response brought on when introducing the sample.

The “cod” symbol will flash for three seconds, then the sample test end result will surface from the Screen as part per million COD. Report the test outcome.

COD contrasts with biochemical oxygen demand (BOD), which depends on using microorganisms to stop working the natural and organic materials from the sample by aerobic respiration around an incubation time period (typically 5 times).

COD Investigation requires the use of a robust oxidizing agent to oxidize the organic and natural compounds in the sample, and the consumed oxidizing agent is then calculated to ascertain the COD price.

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One check here particular vial is marked like a “blank,” and 3 or 4 vials are marked with recognised normal ranges. Two vials are then marked for your wastewater sample to create a replica operate. Note: If many wastewater samples are increasingly being operate, at the least ten% of samples are duplicated.

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This glossary report aims to offer an in-depth idea of Chemical Oxygen Demand, its importance in wastewater therapy, along with the approaches employed for its determination.

As talked about ahead of, COD measures natural subject by making use of a chemical oxidant. It’s vital that a robust more than enough oxidant is utilized to respond with practically all natural substance from the sample.

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