718615

ISO 5315:1984

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

standard by International Organization for Standardization , 06/01/1984

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Full Description

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.

 

Product Details

Published:
06/01/1984
Number of Pages:
5
File Size:
1 file , 410 KB
Same As:
BS 5551-4.1.3:1986
Note:
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