EN 15926:2011

Fertilizers - Extraction of water soluble sulfur where the sulfur is in various forms

This document specifies a method for the extraction of water-soluble sulfur contained in fertilizers in various forms.
The method is applicable to EC-fertilizers for which a declaration of the water-soluble sulfur trioxide is provided for.

Düngemittel - Extraktion von wasserlöslichem Schwefel, der in verschiedener Form vorliegen kann

Das vorliegende Dokument legt ein Verfahren für die Extraktion von wasserlöslichem Schwefel fest, der in verschiedener Form in Düngemitteln enthalten ist.
Das Verfahren gilt für EG Düngemittel, für die eine Deklaration des wasserlöslichen Schwefeltrioxids vorge-schrieben ist.

Engrais - Extraction du soufre soluble dans l'eau, lorsque le soufre est présent sous différentes formes

Le présent document fixe une méthode d’extraction du soufre soluble dans l’eau lorsque celui-ci est présent dans l’engrais sous différentes formes.
Cette méthode s’applique aux engrais CE pour lesquels est prévue une déclaration de l’anhydride sulfurique soluble dans l’eau.

Gnojila - Ekstrakcija v vodi topnega žvepla v različnih oblikah

Ta dokument opredeljuje metodo ekstrakcije v vodi topnega žvepla, vsebovanega v gnojilih v različnih oblikah.
Ta metoda velja za gnojila ES, za katera je predpisana deklaracija o žveplovem trioksidu, topnem v vodi.

General Information

• Status: Published
• Publication Date: 27-Sep-2011
• Withdrawal Date: 30-Mar-2012
• ICS: 65.080 - Fertilizers
• Technical Committee: CEN/TC 260 - Fertilizers and liming materials
• Drafting Committee: CEN/TC 260/WG 7 - Chemical analysis
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 20-Jun-2023
• Completion Date: 11-Feb-2026
• Directive: Not Harmonized2003/2003 - Regulation (EC) N° 2003/2003 of the European Parlament and of the council of 13 October 2003 relating to fertilisers
• Directive:

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  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/335 - Standardization Mandate assigned to the CEN concerning the modernisation of the methods of anylysis of Fertilizers
• Ref Project: SIST EN 15926:2011 - Fertilizers - Extraction of water soluble sulfur where the sulfur is in various forms

Relations

• Replaces: CEN/TS 15926:2009 - Fertilizers - Extraction of water soluble sulfur where the sulfur is in various forms
• Effective Date: 01-Oct-2011
• Refers: EN 12944-1:1999 - Fertilizers and liming materials and soil improvers - Vocabulary - Part 1: General terms
• Effective Date: 28-Jan-2026
• Refers: EN 1482-2:2024 - Fertilizers, liming materials and inhibitors - Sampling and sample preparation - Part 2: General sample preparation provisions
• Effective Date: 28-Jan-2026
• Refers: EN 12944-2:1999 - Fertilizers and liming materials and soil improvers - Vocabulary - Part 2: Terms relating to fertilizers
• Effective Date: 28-Jan-2026
• Referred By: EN 15749:2009 - Fertilizers - Determination of sulfates content using three different methods
• Effective Date: 28-Jan-2026
• Referred By: CEN/TS 17757:2022 - Inorganic fertilizers - Determination of specific nutrients
• Effective Date: 28-Jan-2026
• Referred By: EN 15749:2022 - Fertilizers - Determination of sulfates content using three different methods
• Effective Date: 28-Jan-2026

Overview

EN 15926:2011 is a European standard developed by CEN (European Committee for Standardization) that outlines a method for extracting water-soluble sulfur from fertilizers, where sulfur exists in various chemical forms. This analytical procedure is specifically applicable to EC-fertilizers that require a declaration of water-soluble sulfur trioxide (SO₃). The method is essential for standardizing sulfur analysis in compliance with European fertilizer regulations and quality control requirements.

Key Topics

• Water-Soluble Sulfur Extraction: Details the steps to extract sulfur compounds that are soluble in water from fertilizer samples, ensuring accurate assessment of the sulfur available for plant uptake.
• Applicable Fertilizer Types: Designed for use on a wide range of EC-fertilizers, including those with mixed forms of sulfur, and mandatory declarations of water-soluble SO₃ content.
• Sample Preparation: Emphasizes the need for homogenized, properly prepared samples as per referenced standards to ensure consistency and reliability in results.
• Analytical Procedure: Includes dissolution of sulfur in water, oxidation with hydrogen peroxide in an alkaline medium, and subsequent determination of sulfate content using established sulfate analysis techniques.
• Reporting Requirements: Specifies the information that must be included in the test report for traceability and regulatory compliance.

Applications

The EN 15926:2011 standard is critical for:

• Fertilizer Manufacturers: Performs routine quality control to verify declared content of water-soluble sulfur, meeting product labeling and regulatory requirements.
• Soil and Agricultural Laboratories: Provides a harmonized procedure for analyzing fertilizer samples during testing for agronomic recommendations and legal compliance.
• Regulatory and Certification Bodies: Ensures that fertilizers traded or used within the EU market conform to relevant standards and legislation, particularly Regulation (EC) No 2003/2003.
• Research and Development: Serves as a reference method when developing new fertilizer formulations or studying sulfur bioavailability in various products.

Implementing EN 15926:2011 helps stakeholders ensure that sulfur content in fertilizers is accurately determined, aiding in crop nutrition management and legal conformity across European markets.

Related Standards

• EN 1482-1 & EN 1482-2: Cover sampling and sample preparation for fertilizers and liming materials. Proper sampling is fundamental to the reliability of the EN 15926:2011 extraction results.
• EN 12944-1 & EN 12944-2: Define terminology and vocabulary used for fertilizers, liming materials, and soil improvers.
• EN 15749: Specifies methods for determining sulfate content, which is integral to completing the sulfur extraction procedure described in EN 15926:2011.
• Regulation (EC) No 2003/2003: European legislation that governs placing fertilizers on the market, aligning with analytical methods including those in EN 15926:2011.

Practical Value

Adhering to EN 15926:2011 ensures a consistent, validated method for quantifying water-soluble sulfur in fertilizers, enabling:

• Harmonized laboratory results throughout Europe
• Transparency in fertilizer composition for consumers and regulators
• Enhanced nutrient management in agriculture through informed use of sulfur-containing fertilizers

For those involved with fertilizer quality, analysis, or regulation, EN 15926:2011 is an indispensable resource supporting the safe, efficient, and compliant trade and use of fertilizers across the EU.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Düngemittel - Extraktion von wasserlöslichem Schwefel, der in verschiedener Form vorliegen kannEngrais - Extraction du soufre soluble dans l'eau, lorsque le soufre est présent sous différentes formesFertilizers - Extraction of water soluble sulfur where the sulfur is in various forms65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 15926:2011SIST EN 15926:2011en,fr,de01-november-2011SIST EN 15926:2011SLOVENSKI
STANDARDSIST-TS CEN/TS 15926:20101DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15926
September 2011 ICS 65.080 Supersedes CEN/TS 15926:2009English Version
Fertilizers - Extraction of water soluble sulfur where the sulfur is in various forms
Engrais - Extraction du soufre soluble dans l'eau, lorsque le soufre est présent sous différentes formes
Düngemittel - Extraktion von wasserlöslichem Schwefel, der in verschiedener Form vorliegen kann This European Standard was approved by CEN on 18 August 2011.
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. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
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B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15926:2011: ESIST EN 15926:2011
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