DS EN 16024:2011 Fertilizers - Determination Of 1H-1,2,4-Triazole In Urea And In Fertilizers Containing Urea - Method Using High-Performance Liquid Chromatography (Hplc) Defines a method for the determination of triazole (TZ) in urea or in fertilizers containing urea in the presence of dicyandiamide or methylpyrazole respectively using high-performance liquid chromato