This European Standard specifies a method for the quantitative determination of the urease inhibitors N-(n- Butyl)thiophosphoric acid triamide (NBPT, CAS-No. 94317-64-3) and N-(n-Propyl)thiophosphoric acid triamide (NPPT, CAS-No. 916809-14-8) content in urea based fertilizers using high-performance liquid chromatography (HPLC).
EN 16651:2015 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
EN 1482-1:2007 Fertilizers and liming materials - Sampling and sample preparation - Part 1: Sampling
EN 1482-2:2007 Fertilizers and liming materials - Sampling and sample preparation - Part 2: Sample preparation
EN ISO 3696:1995 Water for Analytical Laboratory Use- Specification and Test Methods (ISO 3696 : 1987)
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
EN 16651:2015 history
2015EN 16651:2015 Fertilizers - Determination of N-(n-Butyl)thiophosphoric acid triamide (NBPT) and N-(n-Propyl)thiophosphoric acid triamide (NPPT) - Method using high-performance liquid chromatography (HPLC)