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ISO 5315:1984

Current Revision

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

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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.


SDO ISO: International Organization for Standardization
Document Number ISO 5315
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 134/SC 4/WG 1
Publish Date Document Id Type View
Not Available ISO 5315:1984 Revision