DS EN 15705:2010 Fertilizers - Determination Of Urea Condensates Using High-Performance Liquid Chromatography (Hplc) - Isobutylidenediurea And Crotonylidenediurea (Method A) And Methylen-Urea Oligomers (Method B) Describes methods for the determination of isobutylidenediurea (IBDU), crotonylidenediurea (CDU) (method A) and methylene-urea oligomers (MU) (method B) in fertilizers using high-performance liquid ch