ISO 7408:1983
p
ISO 7408:1983
14137

Abstract

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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.


General information 

  •  :  Published
     : 1983-12
  •  : 1
     : 5
  •  : ISO/TC 134 Fertilizers, soil conditioners and beneficial substances
  •  :
    65.080 Fertilizers

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