Standard Test Methods for Ammonia Nitrogen In Water

Importancia y uso:

4.1 Nitrogen is a nutrient in the environment and is necessary to sustain growth of most organisms. It exists in several forms such as nitrate, nitrite, organic nitrogen such as proteins or amino acids, and ammonia.

4.2 Ammonia is a colorless, gaseous compound with a sharp distinctive odor. It is highly soluble in water where it exists in a molecular form associated with water and in an ionized form as NH₄⁺. The extent of association or ionization is dependent on the temperature and pH. It may also be toxic to aquatic life. The extent of toxicity is dependent upon species and extent of dissociation.4 Ammonia may occur in water as a product of anaerobic decomposition of nitrogen containing compounds or from waste streams containing ammonia.

Subcomité:

D19.05

Referida por:

D6146-97R18, D3590-17, D6469-24, E1197-12R21, D3590-17, D6469-24, D3223-17, D8083-16R23, D6696-16R23, C0311_C0311M-24, C0311_C0311M-24, C0311_C0311M-24, E1391-03R23

Volúmen:

11.01

Número ICS:

13.060.50 (Examination of water for chemical substances)

Palabras clave:

ammonia; analysis; calorimetric; electrode; water;