Standard Test Method for Total Nitrogen, and Total Kjeldahl Nitrogen (TKN) by Calculation, in Water by High Temperature Catalytic Combustion and Chemiluminescence Detection

Importancia y uso:

5.1 This test method is used for determination of the total or dissolved nitrogen content of water from a variety of natural, domestic, and industrial sources. In its most common form, this test method is used to measure nitrogen as a means of monitoring nutrient pollutant in industrial wastewater, domestic wastewater, and ambient water. These measurements may also be used in monitoring waste treatment processes.

5.2 This test method measures oxidized ammonia and organic nitrogen (as nitrate) and soluble nitrate simultaneously, subtracting the nitrate + nitrite value from a non-digested sample gives total Kjeldhal nitrogen (TKN).

When using this test method:

where:

TN   =   total nitrogen, and TKN   =   total Kjeldahl nitrogen.

Subcomité:

D19.06

Volúmen:

11.02

Número ICS:

13.060.50 (Examination of water for chemical substances)

Palabras clave:

dissolved nitrogen; high temperature catalytic oxidation; nitrogen; organic nitrogen; particulate nitrogen; TKN; total Kjeldahl nitrogen; total nitrogen;