Colorimetric determination of nitrite亚硝酸盐测试盒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 |