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ISO 7408:1983 (R2023)
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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Summary
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.
Notes
90.93 : Norme internationale confirmée
Technical characteristics
| Publisher | International Organization for Standardization (ISO) |
| Publication Date | 12/01/1983 |
| Confirmation Date | 05/23/2023 |
| Edition | 1 |
| Page Count | 5 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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