Many nitrite test kits have the potency to suffer from amine interference resulting in toxic nitrite not being detected. Salifert's Nitrite test kit does not suffer from such an amine interference because very special ingredients are used. These same ingredients also result in a full color development within minutes. The developed color is very intense making detection of even minute traces of nitrite easy. It probably is the most sensitive, accurate and fastest nitrite test kit available. The kit can perform approx. 60 measurements.