NF U42-191
NF U42-191

NF U42-191

November 2019
Standard Current

Fertilizers - Nitrogenous fertilizers containing synthetic organic nitrogen - Determination of the types of nitrogen

Le présent document décrit une méthode permettant de déterminer les teneurs en azote total, ammoniacal, uréique, nitrique et de synthèse organique, ainsi que la solubilité de l'azote de synthèse organique.

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Main informations

Collections

National standards and national normative documents

Publication date

November 2019

Number of pages

15 p.

Reference

NF U42-191

ICS Codes

65.080   Fertilizers

Classification index

U42-191

Print number

1
Sumary
Fertilizers - Nitrogenous fertilizers containing synthetic organic nitrogen - Determination of the types of nitrogen

Le présent document décrit une méthode permettant de déterminer les teneurs en azote total, ammoniacal, uréique, nitrique et de synthèse organique, ainsi que la solubilité de l'azote de synthèse organique.
Replaced standards (1)
NF U42-191
NF U42-191
September 1988
Standard Cancelled
Fertilizers. Nitrogenous fertilizers containing synthetic organic nitrogen. Determination of the types of nitrogen.

La réglementation française prévoit pour les engrais azotés contenant de l'azote de synthèse organique la déclaration de leurs teneurs respectives en azote total, ammoniacal, uréique, nitrique et de synthèse organique, ainsi que la solubilité de l'azote de synthèse organique. La méthode décrite permet donc de déterminer ces valeurs.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Principe
  • 4 Réactifs
  • 5 Appareillage
  • 6 Mode opératoire
  • 7 Expression des résultats
  • 8 Rapport d'essai
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