What is Ammonia?
Ammonia is an inorganic form of nitrogen that contains hydrogen. It is a plant nutrient often found naturally in water at low levels due to the decomposition of organic matter. When ammonia is found at high levels, it usually signals contamination stemming from raw sewage, industrial effluents (particularly petroleum refineries), or fertilizer runoff. Total ammonia is the sum of both NH3 (ammonia, the un-ionized form) and NH4+ (ammonium, the ionized form). Total ammonia is what is measured analytically in water. Ammonia toxicity is influenced by pH and temperature. As pH or temperature increases, NH4+ is converted to NH3, and the toxicity also increases.
Why Test for Ammonia?
ammonia is toxic to aquatic life, the aquaculture industry frequently measures and controls ammonia concentration to keep fish and shellfish alive. Regulatory requirements mandate ammonia monitoring for diverse industries to protect downstream aquatic environments. Examples include wastewater, landfill, acid mine drainage and animal feeding operations where ammonia is measured in effluent, leachate, and unintended discharges. Environmental groups often test water bodies for ammonia as part of their monitoring program to help them assess trends associated with other aquatic health indicators.
About our Test Kits
CHEMetrics offers two different test methods for ammonia, Direct Nesslerization and Hydroxybenzyl Alcohol (HBA). Visual and instrumental test kit formats that span low and high measurement ranges are offered. Test results for visual test kits use color comparators for analysis while instrumental kits rely on CHEMetrics direct-readout photometers or spectrophotometers capable of accepting a 13-mm diameter round cell
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.|
|0-4 & 0-80 ppm||0.125 ppm||Hydroxybenzyl Alcohol (HBA)||K-1420||R-1402|
|0-125 & 0-2500 ppm||8 ppm||Hydroxybenzyl Alcohol (HBA)||K-1420D||R-1402D|
|0-500 & 0-10,000 ppm||30 ppm||Hydroxybenzyl Alcohol (HBA)||K-1420B||R-1402B|
|0-1 & 1-10 ppm||0.05 ppm||Direct Nesslerization||K-1510*||R-1501*|
|0-30 & 30-300 ppm||5 ppm||Direct Nesslerization||K-1510D*||R-1501D*|
|0-60 & 60-600 ppm||10 ppm||Direct Nesslerization||K-1510A*||R-1501A*|
|0-120 & 120-1200 ppm||20 ppm||Direct Nesslerization||K-1510B*||R-1501B*|
|0-1000 & 1000-10,000 ppm||100 ppm||Direct Nesslerization||K-1510C*||R-1501C*|
|Range||Method||Kit Catalog No.|
|0-3.00 & 0-60.0 ppm||Hydroxybenzyl Alcohol (HBA)||K-1413|
|0-7.00 ppm||Direct Nesslerization||K-1503*|
|0-14.0 ppm||Direct Nesslerization||K-1523*|
In the ammonia test kit that employs the Hydroxybenzyl Alcohol chemistry, free ammonia reacts with hypochlorite to form monochloramine. Monochloramine reacts with HBA, in the presence of sodium nitroferricyanide, to form a green colored complex. This test method measures the sum of free ammonia and monochloramine. Results are expressed in ppm (mg/L) ammonia-nitrogen, NH3-N. The Hydroxybenzyl Alcohol Method offers sensitivity similar to the Nesslerization Method and there is no generation of mercury-containing waste.