NF EN 25663
NF EN 25663

NF EN 25663

January 1994
Standard Current mandatory application standard
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Water quality - Determination of kjekldahl nitrogen - Method after mineralization with selenium

Specifies a procedure for the determination of trivalent negative nitrogen. Organic nitrogen in the form of azide, azine, azo, hydrazone, nitrite, nitro, nitroso, oxime or semicarbazone is not determined quantitatively. The procedure is applicable to the analysis of raw, potable and waste waters.

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Main informations

Collections

National standards and national normative documents

Publication date

January 1994

Number of pages

4 p.

Reference

NF EN 25663

ICS Codes

13.060.50   Examination of water for chemical substances

Classification index

T90-110

Print number

1 - janvier 1994

International kinship

ISO 5663:1984

European kinship

EN 25663:1993
Sumary
Water quality - Determination of kjekldahl nitrogen - Method after mineralization with selenium

Specifies a procedure for the determination of trivalent negative nitrogen. Organic nitrogen in the form of azide, azine, azo, hydrazone, nitrite, nitro, nitroso, oxime or semicarbazone is not determined quantitatively. The procedure is applicable to the analysis of raw, potable and waste waters.

Replaced standards (1)
NF T90-110
NF T90-110
December 1981
Standard Cancelled
Testing water. Determination of Kjeldahl nitrogen.

Table of contents
  • 1 Objet et domaine d'application
  • 2 Référence
  • 3 Définition
  • 4 Principe
  • 5 Réactifs
  • 6 Appareillage
  • 7 Échantillonnage et échantillons
  • 8 Mode opératoire
  • 9 Expression des résultats
  • 10 Interférences
  • 11 Notes sur le mode opératoire
  • 12 Procès-verbal d'essai
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