International Standard
ISO 5315:1984
Fertilizers — Determination of total nitrogen content — Titrimetric method after distillation
Reference number
ISO 5315:1984
ISO 5315:1984
Edición 1
1984-05
1984-05
© ISO 2024
International Standard
p
ISO 5315:1984
11322
No disponible en español
Publicado
(Edición 1, 1984)
Esta norma se revisó y confirmó por última vez en 2023.
Por lo tanto, esta versión es la actual.
Resumen
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.
Informaciones generales
-
Estado: PublicadoFecha de publicación: 1984-05Etapa: Norma Internacional confirmada [90.93]
-
Edición: 1Número de páginas: 5
-
Comité Técnico :ISO/TC 134ICS :65.080
- RSS actualizaciones
Ciclo de vida
Got a question?
Check out our FAQs
Customer care
+41 22 749 08 88
Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)