SS-EN-15705 › Inorganic fertilizers - Determination of methylen-urea oligomers using high-performance liquid chromatography (HPLC)
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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.
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65.080 (Fertilizers Including soil conditioners and culture medium)
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Designation Name
SS-EN 15705:2023
Revision Level
2023 EDITION
Status
Current
Publication Date
Dec. 19, 2023
Language(s)
English
Page Count
24
International Equivalent
EN 15705:2023