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VISOCOLOR® alpha Nitrite
 

Colorimetric determination of 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. 935 066
Type colorimetric test kit

Range

0.05 · 0.10 · 0.25 · 0.5 · 1.0 mg/l NO2

Sufficient for 200
Shelf life at least 18 months
Sea water suitability

yes

Detectable with PF-11 no

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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