Glossary
The English version of our glossary is currently under construction and will be regularly updated.
Dissolved organic carbon (DOC)
DOC (dissolved organic carbon) generally refers to organic carbon compounds. A sum parameter, it is used to measure the total amount of dissolved, organic compounds. DOC particles are smaller than 0.45 µm in diameter.
Carbon compounds that are dissolved in water and based on natural or synthetic organic carbon compounds. The range of substances referred to as DOC is broad; examples include humins, organic acids, saccharides and amino acids. These products are secreted into the soil by plants or result from the decomposition of organic substances, either via microbial activity or abiotic processes. DOC fulfils a range of functions in aquatic and semiterrestrial ecosystems.
For example, DOC is an important component of aquatic ecosystems, as it offers a food source for bacteria and other microorganisms that are responsible for maintaining biological processes. The DOC concentration is an important indicator for the quality of water bodies and is frequently used in the contexts of environmental monitoring and water treatment. All carbon compounds considered to be DOC can pass through a filter with a pore diameter of 0.45 μm.