VISOCOLOR® ECO Ammonium 15: Colorimetric determination of ammonium. • DEV: procedure: 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. (Reaction basis according to DIN 38406-E5) • Type: colorimetric test kit • Range: 0 · 0.5 · 1 · 2 · 3 · 5 · 7 · 10 · 15 mg/l NH4+ • Sufficient for: 50 determinations • Shelf life at least: 1.5 years • Sea water suitability: yes, after dilution (1+9) • Detectable with PF-12: yes • 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.