0

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 ISO 7408:1983

Publication date:   Dec 1, 1983

General information

90.93 Standard confirmed   May 23, 2023

ISO

ISO/TC 134 Fertilizers, soil conditioners and beneficial substances

International Standard

65.080   Fertilizers

Buying

Published

Language in which you want to receive the document.

Scope

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.

Life cycle

NOW

PUBLISHED
ISO 7408:1983
90.93 Standard confirmed
May 23, 2023