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Homepage>ISO 7408:1983-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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sklademVydáno: 1983
ISO 7408:1983-Fertilizers — Determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide — Titrimetric method

ISO 7408:1983

ISO 7408:1983-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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Označení normy:ISO 7408:1983
Počet stran:5
Vydání:1
Vydáno:1983
DESCRIPTION

ISO 7408:1983


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.
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