ISO 5314:1981

This standard was last reviewed and confirmed in 2017. Therefore this version remains current.

Abstract

The method consists in distilling of the ammonia from an alkaline solution, absorbing in an excess of standard volumetric sulphuric acid solution and back-titrating with standard volumetric sodium hydroxide solution. It is applicable only in the absence of urea or its derivatives, of cyanamide and of organic nitrogenous compounds.

General information

Status
: Published

Publication date
: 1981-05
Edition
: 1

Number of pages
: 4
Technical Committee
: ISO/TC 134 Fertilizers, soil conditioners and beneficial substances
ICS
:
65.080 Fertilizers