Abstract

This document specifies a method for the determination of the biuret content by high-performance liquid chromatography (HPLC) with ultraviolet (UV) detector. This document is applicable to organic and organo-mineral fertilizers containing urea. This document is applicable to fertilizing products blends where a blend is a mix of at least two of the following products: fertilizers, liming materials, soil improvers, growing media, inhibitors, plant biostimulants and where organic matter is present in at least one of the products in the blend. In case a fertilizing product blend is composed only of inorganic products, the European Standard for inorganic fertilizers applies. Variations in analytical methods for fertilizing product blends can lead to differing results as some components or matrix interactions can affect the outcome. Validation procedures have shown that developed standard methods are robust and reliable across diverse product compositions, but possible interferences and unexpected results when analysing fertilizing product blends are possible.

Begin

2025-06-10

WI

00260327

Planned document number

DIN EN 17765

Project number

05702815

Responsible national committee

NA 057-03-02 AA - Fertilizers  

Responsible european committee

CEN/TC 260/WG 8 - Organic and organo-mineral fertilizers  

draft standard

Organic and organo-mineral fertilizers - Determination of biuret content by high-performance liquid chromatography (HPLC); German and English version prEN 17765:2026
2026-01
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previous edition(s)

Organic and organo-mineral fertilizers - Determination of the biuret content by high-performance liquid chromatography (HPLC); German version CEN/TS 17765:2022
2022-07

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