Home

ISO 5315:1984
Subscribe to updates

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

This standard was last reviewed* in 2012.

*ISO standards are reviewed every five years.

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.

 

  • Edition: 1 (Monolingual) ICS: 65.080
    Status: Published Stage: 90.93 (2012-05-05)
    TC/SC: ISO/TC 134 Number of Pages: 5
  • No revision information available

  • No corrigenda or amendments available

Related standards

Format
  • PDF

    This format preserves the paper layout, and is watermarked

  • EPUB

    This format allows documents to be read on tablets and smartphones

  • COLOUR PDF

    Enhanced user-friendly colour PDF format

  • REDLINE

    See any updates made from previous versions at a glance

  • PAPER

    Normally A4 size documents. Shipping costs apply

Language
PDF
Paper

Swiss francs CHF 38

Add to basket

Contact customer services

Send your enquiry by email
or call us on +41 22 749 08 88
09:00 – 12:30, 14:00 – 17:00 (UTC+1).