The 5-Second Trick For chemical oxygen demand
In the presence of sulfuric acid, silver sulphate, and mercury sulphate, potassium dichromate oxidises the natural and organic make a difference contained while in the drinking water sample to make carbon dioxide (CO2) and h2o (H2O). The amount of potassium dichromate utilised is decided by evaluating the volumes of ferrous ammonium sulphate eaten