NEN-ISO 5663
Water quality - Determination of Kjeldahl nitrogen - Method after mineralization with selenium
active, Most Current
| Organization: | NEN |
| Publication Date: | 1 December 1993 |
| Status: | active |
| Page Count: | 12 |
| ICS Code (Sewage water): | 13.060.30 |
scope:
This standard specifies a method for the determination of nitrogen by a Kjeldahl-type method. Only trivalent negative nitrogen is determined. Organic nitrogen in the form of azide, azine, azo, hydrazone, nitrite, nitro, nitroso, oxime or semicarbazone is not determined quantitatively. Nitrogen may be incompletely recovered from heterocyclic nitrogen compounds.
Document History
NEN-ISO 5663
December 1, 1993
Water quality - Determination of Kjeldahl nitrogen - Method after mineralization with selenium
This standard specifies a method for the determination of nitrogen by a Kjeldahl-type method. Only trivalent negative nitrogen is determined. Organic nitrogen in the form of azide, azine, azo,...