Coulometric titration is a commonly used method for the determination of chemical oxygen demand, with simple operation and fast determination.ģ. It has a good degree of measurement, and the measurement result is consistent with the potassium dichromate standard method. The disadvantage is that the COD value measurement result is slightly different from the potassium dichromate standard method.Ĭoulometric titration method is suitable for the determination of drinking water, surface water, industrial sewage, domestic sewage and other water quality. This method has the advantages of fast measurement speed, short digestion time, less reagent consumption, simple operation and high degree of automation.
Potassium dichromate spectrophotometry is widely used in rapid COD detection and online detection.
Spectrophotometric method of COD analyzer
