Photometry Compendium: Digestion Processes, COD and Reagent Free Measurement

摘要

COD is amongst the most important parameters describing the organic burden of water. Together with few other parameters, COD is used to describe the water quality in environmental monitoring and in monitoring and controle of waste water treatment plants. For correct COD measurement using laboratory photometers, an digestion process is mandatory. But the labour-, time- and equipment-consuming digestion processes as well as the toxic reagents needed, hinder the use of COD measurement in systematic approaches for example in fresh water monitoring.