SIST EN 15956:2011
(Main)Fertilizers - Extraction of phosphorus soluble in mineral acids
Fertilizers - Extraction of phosphorus soluble in mineral acids
This document specifies a method for the determination of phosphorus soluble in mineral acids.
The method is applicable exclusively to phosphate fertilizers listed in Regulation (EC) 2003/2003, Annex I (see [2]).
Düngemittel - Extraktion des in Mineralsäuren löslichen Phosphors
Dieses Dokument legt ein Verfahren zur Bestimmung des in Mineralsäuren löslichen Phosphors fest.
Das Verfahren gilt ausschließlich für die in der Verordnung (EG) 2003/2003, Anhang I [2] aufgeführten Phosphatdünger.
Engrais - Extraction du phosphore soluble dans les acides minéraux
Le présent document spécifie une méthode de dosage du phosphore soluble dans des acides minéraux.
La méthode est exclusivement applicable aux engrais phosphatés listés dans le règlement (CE) 2003/2003, Annexe I (voir [2]).
Gnojila - Ekstrakcija fosforja, topnega v mineralnih kislinah
Ta dokument opredeljuje metodo določanja fosforja, topnega v mineralnih kislinah.
Metoda velja izključno za fosfatna gnojila, navedena v Prilogi I (glej [1]) Uredbe (ES) 2003/2003.
General Information
- Status
- Published
- Public Enquiry End Date
- 30-Jun-2011
- Publication Date
- 17-Oct-2011
- Technical Committee
- KAT - Soil quality
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 17-Oct-2011
- Due Date
- 22-Dec-2011
- Completion Date
- 18-Oct-2011
Relations
- Effective Date
- 01-Nov-2011
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Revised
oSIST prEN 15956:2026 - Inorganic fertilizers - Extraction of phosphorus soluble in mineral acids - Effective Date
- 01-Feb-2026
Overview
SIST EN 15956:2011 - Fertilizers - Extraction of phosphorus soluble in mineral acids is a European standard that establishes a precise analytical method for determining the content of phosphorus that is soluble in mineral acids within phosphate fertilizers. This method is strictly applicable to the fertilizers listed under Regulation (EC) No 2003/2003, Annex I. By providing a controlled laboratory procedure, the standard supports the accurate assessment of fertilizer quality and nutrient content for agricultural and regulatory purposes.
Key Topics
- Method Scope: The standard specifies a procedure involving extraction with nitric and sulfuric acids to quantify phosphorus that dissolves under these conditions, a key indicator of fertilizer solubility and effectiveness.
- Applicability: Exclusive to phosphate fertilizers referenced in EU Regulation (EC) 2003/2003, ensuring harmonized quality and labeling across the European market.
- Reagents and Apparatus: Requires distilled or demineralized water, sulfuric acid, nitric acid, a Kjeldahl or suitable round-bottomed flask, graduated flasks, and phosphate-free filters.
- Laboratory Procedure:
- Accurate weighing of the sample
- Sequential addition and mixing of acids and water
- Heating, boiling, cooling, volume adjustment, and filtration
- Reporting Requirements: Includes details necessary for traceability and reproducibility, such as method references, test conditions, and any notable deviations.
Applications
SIST EN 15956:2011 is essential for:
- Fertilizer Producers: Ensuring products meet legal EU requirements and provide agronomically effective phosphorus levels.
- Regulatory Authorities: Monitoring compliance with nutrient declaration and quality standards under Regulation (EC) 2003/2003.
- Agricultural Laboratories: Performing routine quality control on mineral fertilizers, thereby supporting reliable crop nutrition management.
- Trade and Certification Bodies: Certifying fertilizer quality for cross-border trade within the EU, benefiting from harmonized testing and reporting practices.
Using this standardized method helps ensure comparability of results, fair commercial practices, and protection of end users by confirming phosphorus availability in line with official requirements.
Related Standards
For a comprehensive approach to fertilizer analysis and quality assurance, consider the following related standards:
- EN 1482-1: Fertilizers and liming materials - Sampling and sample preparation - Part 1: Sampling
- EN 1482-2: Fertilizers and liming materials - Sampling and sample preparation - Part 2: Sample preparation
- EN 12944-1: Fertilizers and liming materials and soil improvers - Vocabulary - General terms
- EN 12944-2: Fertilizers and liming materials and soil improvers - Vocabulary - Terms relating to fertilizers
- Regulation (EC) No 2003/2003: Lays out legal requirements for fertilizer composition and labeling in the European Union.
Practical Value
Implementing SIST EN 15956:2011 in laboratory and manufacturing settings promotes:
- Standardized phosphorus testing across the fertilizer industry
- Quality and safety assurance for agricultural products
- Streamlined regulatory compliance with European directives
By following this standard, producers and laboratories contribute to transparent, high-quality practices in the fertilizer sector, supporting agricultural sustainability and market confidence.
Keywords: phosphorus extraction, mineral acid soluble phosphorus, phosphate fertilizers, fertilizer analysis, EU Regulation 2003/2003, quality control, agricultural laboratory standards, SIST EN 15956:2011.
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Frequently Asked Questions
SIST EN 15956:2011 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Fertilizers - Extraction of phosphorus soluble in mineral acids". This standard covers: This document specifies a method for the determination of phosphorus soluble in mineral acids. The method is applicable exclusively to phosphate fertilizers listed in Regulation (EC) 2003/2003, Annex I (see [2]).
This document specifies a method for the determination of phosphorus soluble in mineral acids. The method is applicable exclusively to phosphate fertilizers listed in Regulation (EC) 2003/2003, Annex I (see [2]).
SIST EN 15956:2011 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.
SIST EN 15956:2011 has the following relationships with other standards: It is inter standard links to SIST-TS CEN/TS 15956:2010, SIST EN 12944-2:2002, SIST EN 12944-1:2002, SIST EN 1482-2:2025, SIST-TS CEN/TS 17757:2023, oSIST prEN 15956:2026. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 15956:2011 is associated with the following European legislation: EU Directives/Regulations: 2003/2003; Standardization Mandates: M/335. 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.
SIST EN 15956:2011 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)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gnojila - Ekstrakcija fosforja, topnega v mineralnih kislinahDüngemittel - Extraktion des in Mineralsäuren löslichen PhosphorsEngrais - Extraction du phosphore soluble dans les acides minérauxFertilizers - Extraction of phosphorus soluble in mineral acids65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 15956:2011SIST EN 15956:2011en,fr,de01-november-2011SIST EN 15956:2011SLOVENSKI
STANDARDSIST-TS CEN/TS 15956:20101DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15956
September 2011 ICS 65.080 Supersedes CEN/TS 15956:2009English Version
Fertilizers - Extraction of phosphorus soluble in mineral acids
Engrais - Extraction du phosphore soluble dans les acides minéraux
Düngemittel - Extraktion des in Mineralsäuren löslichen Phosphors 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
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
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 15956:2011: ESIST EN 15956:2011
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