VISOCOLOR® HE Ammonium • Colorimetric determination of ammonium • Monochloramine is derived from ammonium ions as a result of the effect of chlorine in the alkaline range. • Combined with thymol, this forms a blue indophenol dye. (Reaction principle analogous to APHA 4500-NH3, ISO 7150-1 & DIN 38406) • Type: high sensitive test kit • Range: 0.0 · 0.02 · 0.04 · 0.07 · 0.10 · 0.15 · 0.20 · 0.30 · 040 · 0.50 mg/l NH4+ • Sufficient for: 110 determinations • Shelf life at least :12 months • Sea water suitability: no • Detectable with PF-11: no • 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.