Click on a catalog number in the tables below for more information or to purchase a test kit.
|Range||MDL||Method||Kit Catalog No.||Refill Catalog No.|
|0-3.4 ppm as N||0.3 ppm||Zinc Reduction||K-6905||R-6905|
|0-4.5 ppm as N||0.4 ppm||Cadmium Reduction||K-6904||R-6902|
|0-45 ppm as N||4 ppm||Cadmium Reduction||K-6909D||R-6904|
|0-225 ppm as N||20 ppm||Cadmium Reduction||K-6909A||R-6904|
|0-675 ppm as N||60 ppm||Cadmium Reduction||K-6909B||R-6909|
|0-2700 ppm as N||240 ppm||Cadmium Reduction||K-6909C||R-6909|
|Range||Method||Kit Catalog No.|
|0-1.50 ppm as N||Zinc Reduction||K-6913|
|0-1.50 ppm as N||Cadmium Reduction||K-6903|
|0-7.50 ppm as N||Cadmium Reduction||K-6923|
|0-50.0 ppm as NO₃||Cadmium Reduction||K-6933|
Nitrate is the most completely oxidized form of nitrogen. It is formed during the final stages of biological decomposition, either in wastewater treatment facilities or in natural water supplies. Low-level nitrate concentrations may be present in natural waters. However, a Maximum Contaminant Level of 10 ppm nitrate-nitrogen has been established for drinking water by the USEPA.