VISOCOLOR® ECO Nitrite
In acidic solution sulphanilic acid or sulphanilamide are diazotised with nitrite. The diazonium salt is then coupled with an aromatic amine, forming an intensely coloured azo dye. Organic colloids, chlorine, humic acids and coloured heavy metal ions interfere.(Reaction principle analogous to APHA 4500-NO2–B, EPA 35.1, DIN EN 26777-D10)
| Data and ordering information | |
| Cat. No. | 931 044 (931 244) |
| Type | colorimetric test kit (refill pack) |
| Range | 0 · 0.02 · 0.03 · 0.05 · 0.07 · 0.1 · 0.2 · 0.3 · 0.5 mg/l NO2– |
| Sufficient for | 120 determinations |
| Shelf life | at least 18 months |
| Sea water suitability | yes |
| Detectable with PF-11 | yes |
In surface waters nitrite ions are generally present in low concentrations. Their presence in ground water is less common. In waste waters nitrite frequently occurs, even in fairly high concentrations.
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