Објављен
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.
ОБЈАВЉЕН
ISO 7408:1983
90.93
Одлука о потврђивању стандарда
23. 5. 2023.