FprEN 17767

• 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.

• Status: Not Published
• Publication Date: 17-Feb-2027
• ICS: 65.080 - Fertilizers
• Technical Committee: CEN/TC 260 - Fertilizers and liming materials
• Drafting Committee: CEN/TC 260/WG 8 - Organic and organo-mineral fertilizers
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Start Date: 27-Aug-2026
• Due Date: 14-Mar-2027
• Completion Date: 27-Aug-2026
• Directive: Harmonized Standard2019/1009 - Regulation (EU) 2019/1009 of the European Parliament and of the Council of 5 June 2019 laying down rules on the making available on the market of EU fertilising products and amending Regulations (EC) No 1069/2009 and (EC) No 1107/2009 and repealing Regulation (EC) No 2003/2003 (Text with EEA relevance)
• Mandate: M/564 - Fertilising products in support of Regulation (EU) 2019/1009
• Mandate: M/564 Amd 1 - amending Implementing Decision C(2020) 612 as regards certain harmonised standards and standardisation deliverables, deadlines for their adoption and the duration of the validity of the standardisation request
• Mandate: M/564 Amd 2 - Commission Implementing decision amending Implementing Decision C(2020)612 as regards harmonised standards, the deadlines for the adoption of those standards and the duration of the validity of the standardisation request to the European Committee for Standardisation as regards the EU fertilising products in support of Regulation (EU) 2019/1009 of the European Parliament and of the Council
• Ref Project: oSIST prEN 17767:2026 - Organo-mineral fertilizers - Extraction of phosphorus by formic acid

• Revises: CEN/TS 17767:2022 - Organo-mineral fertilizers - Extraction of phosphorus by formic acid
• Effective Date: 11-Jun-2025

Overview

FprEN 17767 is a European Standard developed by CEN (European Committee for Standardization) that specifies a standardized method for extracting phosphorus from organic and organo-mineral fertilizers using 2% formic acid. The procedure enables reliable analysis of the content of soft natural phosphates, facilitating consistent assessment across diverse fertilizer products.

This standard is particularly relevant for fertilizing product blends in which organic fertilizers or organo-mineral fertilizers constitute the highest percentage by mass or volume (or by dry mass for liquids). The method’s aim is to support the accurate determination of phosphorus levels in blended products, ensuring harmonization and comparability in compliance with regulatory and quality requirements.

Key Topics

• Standardized Extraction Procedure: Details the use of 2% (20 g/l) formic acid to extract phosphorus, enabling subsequent determination of soft natural phosphate content in fertilizers.
• Applicability to Blends: Applies specifically to blends composed primarily of organic or organo-mineral fertilizers but also covers cases where the principal component changes, directing users to applicable standards.
• Analytical Robustness: The extraction method has shown robust and reliable performance across a variety of product compositions, despite possible interferences from complex blends or matrix effects.
• Test Reporting: Defines minimum information for test reports, ensuring traceability and reproducibility of results.
• Safety and Competence: Emphasizes laboratory safety and the need for trained personnel in handling chemical reagents and analytical methods.

Applications

• Phosphorus Content Determination: Primary use is for the quantitative extraction and analysis of phosphorus in organic and organo-mineral fertilizers to determine their suitability for agricultural use or regulatory compliance.
• Fertilizer Quality Control: Assures that manufacturers and quality assurance laboratories can accurately verify phosphorus content in fertilizer blends, promoting consistency within the industry.
• Regulatory Compliance: Supports businesses in meeting the requirements of the EU Fertilising Products Regulation (EU) 2019/1009 and relevant national or international legislation.
• R&D and New Product Development: Provides a reference method for research institutions and fertilizer developers working on innovative blends or improved formulations.

Related Standards

• prEN 17774: Specifies the analytical method for phosphorus content determination after extraction, to be used in conjunction with FprEN 17767.
• EN 12944-1 & EN 12944-2: Provide essential vocabulary and definitions for fertilizers, improving clarity and standardization across related documents.
• EN 1482-1, EN 1482-2, EN 1482-3: Outline general sampling provisions and sample preparation methods essential to ensuring representative sample analysis.
• Regulation (EU) 2019/1009: Governs the marketing and use of EU fertilizing products, referencing the need for standardized analytical methods such as those in FprEN 17767.

Practical Value

Adopting FprEN 17767 ensures that fertilizer producers, laboratories, and regulatory bodies have a harmonized, validated procedure for extracting and determining phosphorus in complex fertilizer products. This supports fair trade, consumer safety, and environmental protection by delivering reliable and consistent analytical results in the European marketplace and beyond.

Keywords: organo-mineral fertilizer, phosphorus extraction, formic acid method, fertilizer analysis, fertilizer blends, soft natural phosphate determination, CEN standard, EU fertilizer regulation, quality control, laboratory procedures.

SLOVENSKI STANDARD
01-marec-2026
Organsko-mineralna gnojila - Ekstrakcija fosforja z metanojsko kislino
Organo-mineral fertilizers - Extraction of phosphorus by formic acid
Organisch-mineralische Düngemittel - Extraktion von Phosphor durch Ameisensäure
Engrais organo-minéraux - Extraction du phosphore par l’acide formique
Ta slovenski standard je istoveten z: prEN 17767
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 17767
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2026
ICS 65.080 Will supersede CEN/TS 17767:2022
English Version
Organo-mineral fertilizers - Extraction of phosphorus by
formic acid
Engrais organo-minéraux - Extraction du phosphore Organisch-mineralische Düngemittel - Extraktion von
par l'acide formique Phosphor durch Ameisensäure
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 260.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17767:2026 E
worldwide for CEN national Members.

prEN 17767:2026 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 5
5 Sampling and sample preparation . 6
6 Reagents . 6
7 Apparatus . 6
8 Procedure. 6
8.1 Test portion . 6
8.2 Extraction . 6
9 Test report . 7
Bibliography . 8

prEN 17767:2026 (E)
European foreword
This document (prEN 17767:2026) has been prepared by Technical Committee CEN/TC 260 “Fertilizers
and liming materials”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede CEN/TS 17767:2022.
prEN 17767:2026 includes the following significant technical changes with respect to
CEN/TS 17767:2022:
— The CEN Technical Specification has been adopted as a European Standard;
— Introduction added;
— Scope (Clause 1) updated including the clarification on fertilizing product blends and the analytical
method to be used;
— Clause 9 (Test report) added;
— Bibliography updated.
This document has been prepared under a Standardization Request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
prEN 17767:2026 (E)
Introduction
WARNING — Persons using this document should be familiar with usual laboratory practice. This
document does not purport to address all of the safety issues, if any, associated with its use. It is the
responsibility of the user to establish appropriate health and safety practices and to ensure compliance
with any national regulatory co
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