Advanced technology and new device

The standard method for COD determination -- the potassium dichromate method is reliable and reproducible. However, the operation of this method is complicated, time-consuming, electricity consumption, reagent consumption, and the use of highly toxic mercury sulfate, secondary pollution is serious. Therefore, exploring rapid, energy-saving, reagent saving, less pollution, reliable results, and suitable for the batch determination of COD water samples has become the goal of people's efforts. So we discovered ultraviolet spectrophotometry