$1.00
FOR DETERMINATION OF
Nitrate
RANGE/SENSITIVITY
2 ∙ 8 ∙ 15 ∙ 30 ∙ 50 mg/L NO3–
NUMBER OF TESTS
100
TEST METHOD
Visual Test Kits
MANUFACTURER
Macherey-Nagel
ORDER CODE
935065
Description
The VISOCOLOR® alpha Nitrate Test Kit is for the colorimetric determination of nitrate.
Nitrate is reduced to nitrite with an inorganic reducing agent. Nitrite is then diazotised with an aromatic amine and simultaneously coupled to form an azo dye. Nitrite interferes (same reaction), but can be eliminated by boiling with amidosulphuric acid (order code 918 973). Oxidising substances such as chlorine can lower the result or completely inhibit the reaction depending on their concentration.
Nitrates occur in most ground and surface waters in concentrations of up to 20 mg/L. In addition to geological influences nitrate concentrations can also increase from agricultural sources (fertilisers). VISOCOLOR® test kits are intended for the determination of nitrate in surface and drinking water and in industrial waste waters which do not contain high concentrations of interfering ions.
Suitable for testing sea water.
