ISO 7408:1983

Fertilizers — Determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide — Titrimetric method

The method consists in entraining, by means of a strong current of air, of the ammonia from a moderately alkaline test mixture at ambient temperature into standard volumetric sulfuric acid solution, and back-titrating of the excess sulfuric acid solution with standard volumetric sodium hydroxide solution.

OEN:

ISO

Langue:

English

Code(s) de l'ICS:

65.080

Statut:

Publié

Date de Publication:

1983-11-30

Numéro Standard:

ISO 7408:1983