COD analysis is commonly used to determine the amount of organic pollutants found in surface water and wastewater. The COD value is a useful indicator for measuring the water quality.

The automation of this method is based on exactly the same reaction as the classical method, but instead of titration, a photometric detection is used. All the manual handling steps are automated. An advantage is the use of pre-prepared tubes, minimizing handling of toxic and hazardous reagents. The analyzers can be used with commercial available or self-made COD reaction tubes and is compatible with several photometers.