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ISO 5315:1984

Fertilizers — Determination of total nitrogen content — Titrimetric method after distillation
1. 5. 1984.

Опште информације

90.93     13. 3. 2023.

ISO

ISO/TC 134

Međunarodni standard

65.080  

francuski   engleski  

Kupovina

Objavljen

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Apstrakt

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.

Životni ciklus

TRENUTNO

OBJAVLJEN
ISO 5315:1984
90.93 Odluka o potvrđivanju standarda
13. 3. 2023.