General Information

Abstract

This document specifies a method for the extraction of phosphorus soluble in mineral acids in inorganic fertilizers.

Status
Not Published
Publication Date
13-Jan-2027
ICS
65.080 - Fertilizers
Technical Committee
CEN/TC 260 - Fertilizers and liming materials
Drafting Committee
CEN/TC 260/WG 7 - Chemical analysis
Current Stage
4599 - Dispatch of FV draft to CMC - Finalization for Vote
Start Date
16-Jul-2026
Due Date
01-Jan-2027
Completion Date
16-Jul-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
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
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 15956:2026 - Inorganic fertilizers - Extraction of phosphorus soluble in mineral acids

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Overview

FprEN 15956 is a European standard developed by CEN (European Committee for Standardization). It specifies a reliable method for the extraction of phosphorus that is soluble in mineral acids from inorganic fertilizers. As phosphorus content directly influences the effectiveness and regulatory compliance of fertilizers, standardizing its extraction is essential for manufacturers, laboratories, and regulatory bodies across the agricultural supply chain.

This draft standard, prepared by CEN/TC 260, reflects updated requirements, including revised characteristics for distilled water and removal of references to superseded regulations. It is an essential document for all stakeholders involved in the analysis and quality control of inorganic fertilizers.

Key Topics

  • Scope: The standard details a laboratory method for extracting phosphorus from inorganic fertilizers using a combination of nitric acid and sulfuric acid.
  • Sampling and Sample Preparation: Advises laboratories to receive and prepare homogeneous samples to ensure the accuracy of phosphorus analysis, referencing EN 1482-2 for preparation guidelines.
  • Reagents and Equipment: Specifies the use of reagents of analytical grade and ultrapure water to prevent contamination and ensure reproducible results. Essential apparatus includes a Kjeldahl flask, reflux condenser, and phosphate-free filters.
  • Extraction Procedure: Describes the step-by-step extraction process, starting with precise weighing of the sample, sequential acid addition, controlled boiling, dilution, filtration, and preparation of the final test solution.
  • Reporting: Outlines necessary information for test reports-sample identification, method reference, sampling details, dates, procedural notes, and any incidents that could impact outcomes.

Applications

FprEN 15956 delivers practical value across several domains related to fertilizers and soil management:

  • Quality Control: Fertilizer manufacturers utilize this standard to accurately determine phosphorus content, ensuring product consistency and compliance with market and regulatory requirements.
  • Laboratory Testing: Analytical laboratories adopt this method for routine phosphorus testing of inorganic fertilizer samples, supporting both industry and regulatory clients.
  • Regulatory Compliance: The method aligns with European quality and safety objectives, helping companies respond to statutory demands for accurate and transparent nutrient labelling.
  • Research and Development: Scientists and agronomists reference this standardized extraction technique in studies assessing fertilizer efficiency, environmental safety, and product innovation.

Related Standards

For comprehensive fertilizer analysis and quality assurance, FprEN 15956 should be applied alongside the following related European and international standards:

  • EN 1482-1: Fertilizers, liming materials, and inhibitors - Sampling and sample preparation - Part 1: General sampling provisions.
  • EN 1482-2: Fertilizers, liming materials, and inhibitors - Sampling and sample preparation - Part 2: General sample preparation provisions.
  • EN 12944-1: Fertilizers and liming materials - Vocabulary - Part 1: General terms.
  • EN 12944-2: Fertilizers and liming materials - Vocabulary - Part 2: Terms relating to fertilizers.

These standards ensure that every stage from sampling to terminology is harmonized for accurate phosphorus measurement in inorganic fertilizers.

Key SEO keywords: FprEN 15956, phosphorus extraction, mineral acid soluble phosphorus, inorganic fertilizers, fertilizer analysis standard, CEN standard fertilizers, phosphorus testing method, fertilizer quality control, European fertilizer standards.

Relations

Revises
EN 15956:2011 - Fertilizers - Extraction of phosphorus soluble in mineral acids
Effective Date
02-Apr-2025

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Frequently Asked Questions

FprEN 15956 is a draft published by the European Committee for Standardization (CEN). Its full title is "Inorganic fertilizers - Extraction of phosphorus soluble in mineral acids". This standard covers: This document specifies a method for the extraction of phosphorus soluble in mineral acids in inorganic fertilizers.

This document specifies a method for the extraction of phosphorus soluble in mineral acids in inorganic fertilizers.

FprEN 15956 is classified under the following ICS (International Classification for Standards) categories: 65.080 - Fertilizers. The ICS classification helps identify the subject area and facilitates finding related standards.

FprEN 15956 has the following relationships with other standards: It is inter standard links to EN 15956:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

FprEN 15956 is associated with the following European legislation: EU Directives/Regulations: 2019/1009; Standardization Mandates: M/564, M/564 Amd 1, M/564 Amd 2. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

FprEN 15956 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-februar-2026
Anorganska gnojila - Ekstrakcija fosforja, topnega v mineralnih kislinah
Inorganic fertilizers - Extraction of phosphorus soluble in mineral acids
Anorganische Düngemittel - Extraktion des in Mineralsäuren löslichen Phosphors
Engrais inorganiques - Extraction du phosphore soluble dans les acides minéraux
Ta slovenski standard je istoveten z: prEN 15956
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 15956
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2025
ICS 65.080 Will supersede EN 15956:2011
English Version
Inorganic fertilizers - Extraction of phosphorus soluble in
mineral acids
Engrais inorganiques - Extraction du phosphore Anorganische Düngemittel - Extraktion des in
soluble dans les acides minéraux Mineralsäuren löslichen Phosphors
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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15956:2025 E
worldwide for CEN national Members.

prEN 15956:2025 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 4
5 Sampling and sample preparation . 4
6 Reagents . 4
7 Apparatus . 5
8 Procedure . 5
8.1 Test portion . 5
8.2 Extraction . 5
9 Test report . 5
Bibliography .
...