This standard was last reviewed and confirmed in 2017. Therefore this version remains current.
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.
Status: PublishedPublication date: 1983-12
Edition: 1Number of pages: 5
Technical Committee: ISO/TC 134 Fertilizers, soil conditioners and beneficial substances
- ICS :
- 65.080 Fertilizers
This standard contributes to the following Sustainable Development Goals:
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Stage: 90.60 (Under review)
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