Abstract

This document specifies the procedure for the extraction of different organic and organo-mineral fertilizers with 2 % formic acid (20 g/l) to enable a subsequent determination of phosphorus, representing the amount of soft natural phosphates. This document is applicable to the fertilizing products blends where a blend is a mix of at least two of the following components: fertilizers, liming materials, soil improvers, growing media, inhibitors, plant biostimulants, and where the following category: organic fertilizers, organo-mineral fertilizers is the highest % in the blend by mass or volume, or in the case of liquid form by dry mass. If the organic fertilizer or the organo-mineral fertilizer is not the highest % in the blend, the European Standard for the highest % of the blend applies. In case a fertilizing product blend is composed of components in equal quantity, the user decides which standard to apply. 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

00260324

Planned document number

DIN EN 17767

Project number

05702818

Responsible national committee

NA 057-03-02 AA - Fertilizers  

Responsible european committee

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

draft standard

Organo-mineral fertilizers - Extraction of phosphorus by formic acid; German and English version prEN 17767:2026
2026-02
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previous edition(s)

Organo-mineral fertilizers - Extraction of phosphorus by formic acid; German version CEN/TS 17767:2022
2022-07

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