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Homepage>ISO Standards>ISO 5315:1984-Fertilizers — Determination of total nitrogen content — Titrimetric method after distillation
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download between 0-24 hoursReleased: 1984
ISO 5315:1984-Fertilizers — Determination of total nitrogen content — Titrimetric method after distillation

ISO 5315:1984

ISO 5315:1984-Fertilizers — Determination of total nitrogen content — Titrimetric method after distillation

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Standard´s number:ISO 5315:1984
Pages:5
Edition:1
Released:1984
DESCRIPTION

ISO 5315:1984


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.
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