Codes & Standards - Purchase
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
SKU: iso_014137_105991
Published by ISO
Publication Year 1983
1 Edition
5 pages
Product Details
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.