ISO 25705:2016 PDF

Scope: This International Standard specifies methods for the determination of isobutylidene diurea (IBDU), Crotonylidene diurea (CDU) (method A) and methylene-urea oligomers (MU) (method B) in fertilizers using high-performance liquid chromatography (HPLC). The method is applicable to all fertilizers which do not contain interfering organic compounds.

ISO 25705:2016 Referenced Document

EN 12944-1:1999 Fertilizers and Liming Materials - Vocabulary - Part 1: General Terms
EN 12944-2:1999 Fertilizers and Liming Materials - Vocabulary - Part 2: Terms Relating to Fertilizers
ISO 14820-1:2016 Fertilizers and liming materials - Sampling and sample preparation - Part 1: Sampling*， 2016-05-01 Update
ISO 14820-2:2016 Fertilizers and liming materials - Sampling and sample preparation - Part 2: Sample preparation*， 2016-05-01 Update
ISO 3696:1987 Water for analytical laboratory use; Specification and test methods
ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results - Part 1: General principles and definitions
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method

2016 ISO 25705:2016 Fertilizers - Determination of urea condensates using high-performance liquid chromatography (HPLC) - Isobutylidenediurea and crotonylidenediurea (method A) and methylen-urea oligomers (method B)