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Description
Colorimetric determination of ammonium
In alkaline medium ammonium ions react with chlorine to form chloroamine which in the presence of a catalyst forms a blue coloured indophenol with phenols.
Ammonium ions occur primarily in domestic waste waters, but frequently also in industrial waste waters. In surface and ground waters ammonium ions indicate decomposition of animal or vegetable substances. Control of the ammonium values is therefore important to the water supply.
