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SRPS EN 15705:2024

Inorganic fertilizers - Determination of methylen-urea oligomers using high-performance liquid chromatography (HPLC)

Mar 29, 2024

General information

60.60     Mar 29, 2024

ISS

H134

European Norm

65.080  

English  

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Scope

This document specifies a method for the determination of methylen-urea (MU) oligomers in inorganic fertilizers using high-performance liquid chromatography (HPLC).
The method is applicable to all fertilizers which do not contain interfering organic compounds.
NOTE By the condensation of urea and formaldehyde, several oligomers are formed, such as methylen-diurea (MDU), dimethylen-triurea (DMTU), trimethylen-tetraurea (TMTU) and higher oligomers. The three molecules named here are the most soluble in water, while the higher compounds are insoluble in hot water, but their nitrogen is available for plants by microbiological decomposition. Also, urea is always a companion of MU-oligomers.

Life cycle

PREVIOUSLY

WITHDRAWN
SRPS EN 15705:2011

NOW

PUBLISHED
SRPS EN 15705:2024
60.60 Standard published
Mar 29, 2024

Related project

Adopted from EN 15705:2023 IDENTICAL