International Standard
ISO 5315:1984
Fertilizers — Determination of total nitrogen content — Titrimetric method after distillation
Reference number
ISO 5315:1984
Edition 1
1984-05
International Standard
Read sample
ISO 5315:1984
11322
Published (Edition 1, 1984)
This standard was last reviewed and confirmed in 2023. Therefore this version remains current.

ISO 5315:1984

ISO 5315:1984
11322
Language
Format
CHF 42
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Abstract

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.

General information

  •  : Published
     : 1984-05
    : International Standard confirmed [90.93]
  •  : 1
     : 5
  • ISO/TC 134
    65.080 
  • RSS updates

Life cycle

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