ISO 5315:1984

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

Publication date: May 1, 1984

General information

Current stage: 90.93 Effective date: Mar 13, 2023

Originator: ISO

Owner: ISO/TC 134

Type: International Standard

ICS: 65.080

Languages: French English

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Status: Published

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Scope

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.

Life cycle

NOW

PUBLISHED
ISO 5315:1984
90.93 Standard confirmed
Mar 13, 2023

National adoptions

SSH ISO 5315:1984

DPS

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

60.60 Standard published

DPS/KT 47 more

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