Ammonia Nitrogen Test Kit




LaMotte ammonia nitrogen test kits are for the determination of ammonia nitrogen in water.  There are three kits to choose from (see specifications tab below for details).

Colorimetric tests are those which determine the concentration of a substance based on Beer’s Law which states that the higher the concentration of a substance the more light is absorbed by the sample and the darker the colour develops.  Two colorimetric methods are available (Nessler and salicylate):

Nessler’s reagent reacts with ammonia to form a yellow to brown colour.

Salicylate reacts to form a blue colour, which in combination with the yellow reagent colour produces colours from yellow to blue.  The salicylate method is preferred for salt water analysis and does not contain mercury salts as does the Nessler method.

There are two test methods available (octa-slide 2 comparator and colour chart comparator):

Octa-Slide 2 Comparator
A colour bar sits next to the reacted sample test tube, allowing all 8 colour standards to be viewed and compared at once.

Colour Chart Comparator
Colour charts are laminated colour standards.  The reacted sample is held against the chart and compared to the colour standards.



Test Test method Range/sensitivity No. of tests Test kit order code Refill order code
Ammonia nitrogen Salicylate 0.0, 0.05, 0.1, 0.25, 0.5, 1.0, 2.0 ppm NH3-N 50 3304-01 R-3304-01
Ammonia nitrogen Salicylate 0.1, 0.25, 0.50, 1.0, 2.0, 4.0 ppm NH3-N 50 5864-01 R-5864-01
Ammonia nitrogen Nessler 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ppm NH3-N 50 4795-01 R-3315