E-training AOX (adsorbable organically bound halogens)
AOX – It’s easier than you thought!
The photometric determination of AOX is an important part of environmental analysis, especially in the analysis of water and sewage sludge. AOX compounds are often used in the context of certain industrial products and pharmaceuticals. Unlike other sum parameters such as COD or TOC, AOX does not indicate oxidizability, but is a measure of organic halogenated compounds that are generally not biodegradable. In fact, AOX detects very specific compounds that can accumulate in uncontrolled inputs and are highly hazardous to humans and the environment.
The method for determining AOX was developed in the mid-1970s by Wolfgang Kühn at the University of Karlsruhe, Germany, and is regulated by DIN ISO 9562. In general, the AOX determination can be divided into 3 phases:
In the first step, the AOX substances are extracted on activated carbon or an adsorbent polymer. The bound halogenated organic molecules are then digested and converted to chloride. In the final step, the released chloride is detected by instrumentation, such as a photometer.
To learn more about AOX determination, please visit the NANOCOLOR AOX 3 tube test product page or our new AOX E-training.
