The Cadmium Reduction Method
Nitrate is reduced to nitrite using cadmium as the reducing agent. The resulting nitrite concentration is then determined colorimetrically. This method is applicable to drinking and surface waters, as well as domestic and industrial wastes. Nitrite will interfere with this test. Results are expressed as ppm (mg/L) NO3-N or NO3.
The Zinc Reduction Method NEW!
Nitrate is reduced to nitrite using zinc as the reducing agent. The resulting nitrate concentration is then determined colorimetrically. This method is applicable to industrial wastewaters, drinking, and surface waters. These test kits can also be used for the analysis of seawater. This method will measure nitrate in the presence of low levels of nitrite (by difference). Results are expressed as ppm (mg/L) NO3-N.
The test kits that employ this method include sample tubes that are pre-dosed with zinc reagent, so the awkward use of foil packs is eliminated.
Ordering Information:
Analyte: NITRATE (nitrogen)
Method: CADMIUM REDUCTION/AZO DYE FORMATION METHOD
Type: CHEMet
K-6904 0-4.5 ppm as N
K-6909D 0-45 ppm as N
K-6909A 0-225 ppm as N
K-6909B 0-675 ppm as N
K-6909C 0-2700 ppm as N
Analyte: NITRATE (nitrogen)
Method: ZINC REDUCTION METHOD
Type: CHEMet
K-6905 0-3.4 ppm as N
Test kits contain 30 ampoules, snap cup, accessory solutions (when necessary), MSDS, and instructions. Refill packs of 30 ampoules, and accessory solutions are available.
i6904