Colorimetric determination of nitrite亞硝酸鹽測試盒
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-NO_2^-B, EPA 35.1, DIN EN 26777-D10)
Data and ordering information：

Cat. No.	920 063
Type	high sensitive test kit
Range	0.0-0.005-0.010-0.015-0.02-0.03-0.04-0.06-0.08-0.10 mg/l NO2–
Sufficient for	150 determinations
Shelf life	at least 24 months
Sea water suitability	yes
Detectable with PF-11	no