General Information

Abstract

This document specifies a method for the extraction of water-soluble calcium, magnesium, sodium and sulfur (in the form of sulfates), so that the same extract can be used for the determination of each nutrient required.
This document is applicable to 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 15961:2026 - Inorganic fertilizers - Extraction of water-soluble calcium, magnesium, sodium and sulfur in the form of sulfates

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Overview

FprEN 15961: Inorganic fertilizers - Extraction of water-soluble calcium, magnesium, sodium and sulfur in the form of sulfates is a draft European Standard developed by CEN/TC 260, focusing on fertilizers and liming materials. This standard specifies a method for extracting water-soluble calcium, magnesium, sodium, and sulfur (as sulfates) from inorganic fertilizers, enabling the same extract to be used for the determination of each nutrient. The standard is applicable to a wide range of inorganic fertilizers, providing a unified procedure that improves laboratory consistency, supports fertilizer quality control, and facilitates regulatory compliance.

Key Topics

  • Methodology for Extraction: Outlines a standardized approach to extracting water-soluble nutrients from inorganic fertilizers, specifically targeting calcium, magnesium, sodium, and sulfur present as sulfates.
  • Sample Preparation: Stresses the importance of representative sampling and sample homogenization to ensure reliable analysis results.
  • Laboratory Best Practices: Details the use of distilled or demineralized water, boiling procedures, and filtration to obtain transparent solutions suitable for analytical testing.
  • Reporting Requirements: Describes minimum information to be included in the test report, such as sample identification, reference to the standard, sampling details, and any deviations from the procedure.
  • Updates from Previous Editions: Reflects technical updates and aligns with the latest fertilizer terminology and analytical practices.

Applications

The procedures set out in FprEN 15961 are essential in a variety of practical contexts within the fertilizer industry and laboratory sector:

  • Nutrient Content Determination: Laboratories use this standard to accurately assess the concentrations of water-soluble calcium, magnesium, sodium, and sulfur in inorganic fertilizers, which is vital for product labeling and quality control.
  • Regulatory Compliance: Fertilizer manufacturers and distributors must ensure products meet regulatory standards for nutrient declarations, using this method to provide reliable, traceable analysis.
  • Research and Development: Fertilizer R&D teams rely on standard extraction procedures to compare formulations, investigate nutrient availability, and evaluate product performance.
  • Trade and Supply Chain: Standardized nutrient analysis supports fair trade, contract fulfillment, and dispute resolution by providing consistent, reproducible data on fertilizer composition.

Related Standards

Several other standards and reference documents are closely associated with the application of FprEN 15961 in fertilizer analysis:

  • EN 1482-2: Fertilizers, liming materials and inhibitors - Sampling and sample preparation - Part 2: General sample preparation provisions
  • EN 1482-1: Fertilizers, liming materials and inhibitors - Sampling and sample preparation - Part 1: General sampling provisions
  • EN 1482-3: Fertilizers, liming materials and inhibitors - Sampling and sample preparation - Part 3: Sampling of static heaps
  • 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

By following FprEN 15961 and related standards, laboratories and fertilizer stakeholders ensure accurate, comparable, and compliant nutrient analysis, strengthening both product quality and regulatory confidence across the industry.

Relations

Revises
EN 15961:2017 - Fertilizers - Extraction of water-soluble calcium, magnesium, sodium and sulfur in the form of sulfates
Effective Date
02-Apr-2025

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Frequently Asked Questions

FprEN 15961 is a draft published by the European Committee for Standardization (CEN). Its full title is "Inorganic fertilizers - Extraction of water-soluble calcium, magnesium, sodium and sulfur in the form of sulfates". This standard covers: This document specifies a method for the extraction of water-soluble calcium, magnesium, sodium and sulfur (in the form of sulfates), so that the same extract can be used for the determination of each nutrient required. This document is applicable to inorganic fertilizers.

This document specifies a method for the extraction of water-soluble calcium, magnesium, sodium and sulfur (in the form of sulfates), so that the same extract can be used for the determination of each nutrient required. This document is applicable to inorganic fertilizers.

FprEN 15961 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 15961 has the following relationships with other standards: It is inter standard links to EN 15961:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

FprEN 15961 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 15961 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 v vodi topnega kalcija, magnezija in natrija ter
žvepla v obliki sulfata
Inorganic fertilizers - Extraction of water-soluble calcium, magnesium, sodium and sulfur
in the form of sulfates
Anorganische Düngemittel - Extraktion von wasserlöslichem Calcium, Magnesium und
Natrium sowie von Schwefel in Form von Sulfat
Engrais inorganiques - Extraction du calcium, du magnésium, du sodium et du soufre
solubles dans l’eau sous la forme de sulfates
Ta slovenski standard je istoveten z: prEN 15961
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
prEN 15961
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2025
ICS 65.080 Will supersede EN 15961:2017
English Version
Inorganic fertilizers - Extraction of water-soluble calcium,
magnesium, sodium and sulfur in the form of sulfates
Engrais inorganiques - Extraction du calcium, du Anorganische Düngemittel - Extraktion von
magnésium, du sodium et du soufre solubles dans l'eau wasserlöslichem Calcium, Magnesium und Natrium
sous la forme de sulfates sowie von Schwefel in Form von Sulfat
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 15961:2025 E
worldwide for CEN national Members.

prEN 15961:2025 (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 Preparation of the solution . 5
9 Test report . 5
Bibliography .
...