Nitrite is naturally present in soil, water and food, and regularly testing its concentration is essential for many applications. Nitrites must be closely monitored in drinking and groundwater as well as in process, waste, or aquarium water. In farm produce and fruit juices, high nitrate concentrations affect quality and keeping properties and can constitute serious health risks. Nitrites are also used in additives for food products and serve as corrosion inhibitors in engine cooling systems.
Color Reaction: In the presence of an acidic buffer, nitrite reacts with an aromatic amine to form a diazonium salt which in turn reacts with N-(1-naphthyl)-ethylenediamine to form a red-violet azo dye, the concentration of which is determined reflectometrically. Reflectoquant® Nitrite Test Strips are used with the Reflectoquant® RQflex® 10 Meter Reflectometer Analysis System. Measuring Range: 0.5 to 25.0ppm. 50 Nitrite Test Strips/Pack. EMD Millipore Part Number: 1.16973.0001