prBAS EN 15705:2025
Inorganic fertilizers - Determination of methylen-urea oligomers using high-performance liquid chromatography (HPLC)
General information
Status:Project
Number of pages:16
Adoption method:Proglašavanje
Language:engleski
Edition:2.
Realization date:22.11.2024
Forseen date for next stage code:12.03.2025
Technical committee:BAS/TC 45, Agriculture
ICS:
65.080, Fertilizers
Abstract
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.
Lifecycle
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Original document and degree of correspondence
EN 15705:2023, identical
Relation to BAS standards
Work material
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