Overview
SIST EN 17864:2024 is a European standard developed by CEN that specifies a method for the determination of nitrogen content in two important inorganic fertilizer compounds: IBDU (isobutylidenediurea) and CDU (crotonylidenediurea). The method utilizes high-performance liquid chromatography (HPLC) to provide accurate and reliable nitrogen content measurement. This standard replaces and updates EN 15705:2010, reflecting advancements in analytical techniques and splitting the previous method into two distinct documents.
The standard is applicable to fertilizers without interfering organic compounds and aims to support fertilizer quality control, regulatory compliance, and optimization of fertilizer formulations.
Key Topics
- Nitrogen Determination Method: Based on HPLC analysis of aqueous extracts from fertilizer samples.
- Analytes: Isobutylidenediurea (IBDU) and Crotonylidenediurea (CDU).
- Analytical Procedure:
- Sample preparation by water extraction, ultrasonic treatment, and magnetic stirring.
- Calibration using pure IBDU and CDU stock solutions.
- Use of a reversed-phase HPLC system with a UV detector.
- Quality Assurance:
- Calibration validation through stock and working calibration solutions.
- Precision studies with repeatability and reproducibility tests documented.
- Calculation: Nitrogen content is derived from IBDU and CDU concentrations using conversion factors.
- Equipment Required:
- Analytical balance, ultrasonic bath, magnetic stirrer, disposable filters.
- HPLC system with C18 reverse phase column and UV detector.
Applications
SIST EN 17864:2024 provides a standardized and robust analytical approach for:
- Fertilizer Manufacturers: Ensuring product quality by quantifying the nitrogen content in IBDU and CDU-based fertilizers.
- Regulatory Bodies: Verifying compliance with fertilizer labeling and nutrient content regulations.
- Agricultural Laboratories: Conducting routine analysis for fertilizer efficacy and formulation development.
- Research and Development: Supporting studies on slow-release nitrogen fertilizers and improving nutrient management strategies in agriculture.
By implementing this standard, stakeholders can achieve precise nitrogen measurements critical for optimizing fertilizer performance, reducing environmental impact, and improving crop yield.
Related Standards
- EN 1482-2: Fertilizers and liming materials - Sampling and sample preparation - Part 2: Sample preparation.
- EN 12944-1 & EN 12944-2: Fertilizers and liming materials - Vocabulary covering general terms and those specific to fertilizers.
- EN 15705:2023: Complementary standard containing other nitrogen determination methods relevant to fertilizers.
- ISO 5725: Guidelines for precision of measurement methods and results, applied here for repeatability and reproducibility validation.
Keywords: EN 17864, inorganic fertilizers, nitrogen content determination, IBDU analysis, CDU analysis, high-performance liquid chromatography, HPLC fertilizer testing, fertilizer quality control, slow-release nitrogen fertilizers, fertilizer standards Europe, CEN fertilizer methods, fertilizer analytical procedures.