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ISO 7408:1983

Current Revision

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

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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.


SDO ISO: International Organization for Standardization
Document Number ISO 7408
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 134/SC 4
Publish Date Document Id Type View
Not Available ISO 7408:1983 Revision