Key Facts
- Easy handling
- safe
- low cost
Categories
- 06.1 Analysis
Key Facts
- Easy handling
- safe
- low cost
Product Description
The chemical oxygen demand (COD) is one of the most
important parameters for the assessment of industrial and municipal wastewater.
As a cumulative parameter, COD determines all chemically oxidizable components
present in water. Hence, this includes not only biodegradable substances (as in
the BOD5), but also chemical compounds that cannot be determined by biological
oxidation (e.g. nitrogen compounds such as nitrites). It has also the advantage
of a faster availability compared to BOD. The COD indicates the contamination
of a water sample. It is therefore also used as an evaluation parameter to
determine pollution units in discharges under the German Wastewater Charges
Act. By definition (ISO 15705), the COD is the concentration of oxygen that is
equivalent to the mass of potassium dichromate that is consumed in total
oxidation of organic substances present in the water sample. Mercury sulfate
and silver sulfate as well as sulfuric acid are listed as auxiliary reagents.
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How to perform NANOCOLOR COD tube tests
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