Norm

ISO 5315:1984 en

Fertilizers - Determination of total nitrogen content - Titrimetric method after distillation

31,57

Over deze norm

Status Definitief
Aantal pagina's 5
Commissie Meststoffen
Gepubliceerd op 01-05-1984
Taal Engels
The method consists in reducing of nitrate to ammonia by chromium powder in acid medium, converting of organic and urea nitrogen into ammonium sulfate by digestion with concentrated sulfuric acid in the presence of a catalyst, distilling of the ammonia from an alkaline solution and absorbing in an excess of standard volumetric sodium hydroxide solution. The method is not recommended for materials containing more than 7 % of organic matter.

Details

ICS-code 65.080
Nederlandse titel Fertilizers - Determination of total nitrogen content - Titrimetric method after distillation
Engelse titel Fertilizers - Determination of total nitrogen content - Titrimetric method after distillation

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