EN 15919:2011
(Main)Fertilizers - Extraction of phosphorus soluble in 2 % formic acid
Fertilizers - Extraction of phosphorus soluble in 2 % formic acid
This document specifies the procedure for the determination of phosphorus soluble in 2 % formic acid (20 g per litre). The method is applicable to soft natural phosphates exclusively.
Düngemittel - Extraktion des in 2%iger Ameisensäure löslichen Phosphors
Dieses Dokument legt ein Verfahren zur Bestimmung des in 2%iger Ameisensäure (20 g/l) löslichen Phos-phors fest. Das Verfahren ist ausschließlich auf weicherdiges Rohphosphat anwendbar.
Engrais - Extraction du phosphore soluble dans l'acide formique à 2 %
Le présent document a pour objet de fixer une méthode de dosage du phosphore soluble dans l’acide formique à 2 % (20 g par litre). La présente méthode s’applique exclusivement aux phosphates naturels tendres.
Gnojila - Ekstrakcija fosforja, topnega v 2-odstotni mravljinčni kislini
Ta dokument opredeljuje postopek določanja fosforja, topnega v 2-odstotni mravljinčni kislini (20 g na liter). Ta metoda velja izključno za mehke naravne fosfate.
General Information
- Status
- Published
- Publication Date
- 07-Jun-2011
- Withdrawal Date
- 30-Dec-2011
- 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
- 08-Jul-2022
- Completion Date
- 14-Apr-2025
Relations
- Effective Date
- 09-Aug-2010
Overview
EN 15919:2011 is a CEN (European Committee for Standardization) method standard that specifies the laboratory procedure for the determination of phosphorus soluble in 2 % formic acid (20 g·L⁻¹). The method applies exclusively to soft natural phosphates and is intended to support consistent analytical testing of fertilizers and phosphate materials across European laboratories. It supersedes CEN/TS 15919:2009 and is linked to EU fertilizer regulation practices.
Key topics and technical requirements
- Scope: Determination of phosphorus extractable with 2 % formic acid from soft natural phosphates.
- Sample preparation: Sampling is not included in the method; sample preparation and grinding for homogeneity should follow EN 1482-2 (and EN 1482-1 for sampling recommendations).
- Reagents: Use distilled or demineralised water and 2 % formic acid (prepared by diluting concentrated formic acid as specified).
- Test portion: Weigh 5.000 g (±0.001 g) of laboratory sample into a dry 500 ml graduated flask.
- Extraction conditions:
- Add 2 % formic acid at (20 ± 1) °C to about 1 cm below the mark and make up to volume.
- Close and shake on a rotary shaker (35–40 turns/min) for 30 minutes at (20 ± 2) °C.
- Filtration and analysis: Filter through a dry pleated phosphate‑free filter, discard the first filtrate, and collect sufficient filtrate to determine phosphorus according to CEN/TS 15959.
- Apparatus: Common lab glassware, 500 ml wide-neck graduated flask, rotary shaker, dry pleated filter.
Applications and users
EN 15919:2011 is practical for:
- Fertilizer manufacturers and quality control laboratories performing routine batch testing of natural phosphate materials.
- Analytical laboratories tasked with product specification, quality assurance, or classification of phosphate raw materials.
- Regulatory bodies and conformity assessment bodies verifying compliance with fertilizer regulations and classification of soft vs hard phosphates.
- R&D and agronomy teams evaluating phosphate solubility characteristics for product formulation and agronomic performance studies.
The method helps differentiate soft natural phosphates (readily soluble in mild organic acid) from harder sources and supports accurate reporting of phosphorus availability in fertilizer materials.
Related standards
- EN 1482-1 / EN 1482-2 - Sampling and sample preparation for fertilizers and liming materials
- EN 12944-1 / EN 12944-2 - Vocabulary for fertilizers and soil improvers
- CEN/TS 15959 - Determination of extracted phosphorus (used for final phosphorus quantification)
- Regulation (EC) No 2003/2003 - Fertilisers (referenced for regulatory context)
Keywords: EN 15919:2011, fertilizers, phosphorus extraction, 2% formic acid, soft natural phosphates, CEN standard, analytical method, formic acid extraction, fertilizer quality control.
Frequently Asked Questions
EN 15919:2011 is a standard published by the European Committee for Standardization (CEN). Its full title is "Fertilizers - Extraction of phosphorus soluble in 2 % formic acid". This standard covers: This document specifies the procedure for the determination of phosphorus soluble in 2 % formic acid (20 g per litre). The method is applicable to soft natural phosphates exclusively.
This document specifies the procedure for the determination of phosphorus soluble in 2 % formic acid (20 g per litre). The method is applicable to soft natural phosphates exclusively.
EN 15919:2011 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.
EN 15919:2011 has the following relationships with other standards: It is inter standard links to CEN/TS 15919:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 15919:2011 is associated with the following European legislation: EU Directives/Regulations: 2003/2003, 2019/1009; 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.
EN 15919:2011 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.NLVOLQLDüngemittel - Extraktion des in 2%iger Ameisensäure löslichen PhosphorsEngrais - Extraction du phosphore soluble dans l'acide formique à 2 %Fertilizers - Extraction of phosphorus soluble in 2 % formic acid65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 15919:2011SIST EN 15919:2011en,fr,de01-oktober-2011SIST EN 15919:2011SLOVENSKI
STANDARDSIST-TS CEN/TS 15919:20101DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15919
June 2011 ICS 65.080 Supersedes CEN/TS 15919:2009English Version
Fertilizers - Extraction of phosphorus soluble in 2 % formic acid Engrais - Extraction du phosphore soluble dans l'acide formique à 2 %
Düngemittel - Extraktion des in 2%iger Ameisensäure löslichen Phosphors This European Standard was approved by CEN on 29 April 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 15919:2011: ESIST EN 15919:2011
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