Fertilizers - Extraction of phosphorus soluble in 2 % citric acid

This European Standard specifies the procedure for the determination of phosphorus soluble in 2 % citric acid (20 g/l).
The method is applicable only to types of basic slag (see [1], Annex I A).

Düngemittel - Extraktion des in 2%iger Citronensäure löslichen Phosphors

Das vorliegende Dokument legt ein Verfahren für die Bestimmung des in 2%iger Citronensäure (20 g/l) löslichen Phosphors fest.
Das Verfahren ist nur auf Arten von Thomasphosphat anwendbar (siehe [1], Anhang I A).

Engrais - Extraction du phosphore soluble dans l'acide citrique à 2 %

La présente norme européenne a pour objet de fixer une méthode de dosage du phosphore soluble dans l’acide citrique à 2 % (20 g/l).
La présente méthode s’applique exclusivement au type « scories de déphosphoration » (voir [1], Annexe I A).

Gnojila - Ekstrakcija fosforja, topnega v 2-odstotni citronski kislini

Ta dokument opredeljuje postopek določanja fosforja, topnega v 2-odstotni citronski kislini (20 g/l). Metoda velja le za vrste bazične žlindre.

General Information

Status
Published
Public Enquiry End Date
31-Jan-2011
Publication Date
12-Sep-2011
ICS
65.080 - Fertilizers
Technical Committee
KAT - Soil quality
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
07-Sep-2011
Due Date
12-Nov-2011
Completion Date
13-Sep-2011
Directive
2003/2003 - Regulation (EC) N° 2003/2003 of the European Parlament and of the council of 13 October 2003 relating to fertilisers
Mandate
M/335 - Standardization Mandate assigned to the CEN concerning the modernisation of the methods of anylysis of Fertilizers
Ref Project
EN 15920:2011 - Fertilizers - Extraction of phosphorus soluble in 2 % citric acid

Relations

Replaces
SIST-TS CEN/TS 15920:2010 - Fertilizers - Extraction of phosphorus soluble in 2 % citric acid
Effective Date
01-Oct-2011

Overview

EN 15920:2011 is a CEN European Standard that specifies a laboratory procedure for the determination of phosphorus soluble in 2 % citric acid (20 g/l) in fertilizing materials. The method is intended specifically for certain types of basic slag and describes the extraction step that precedes phosphorus quantification. EN 15920:2011 supersedes CEN/TS 15920:2009 and was prepared by CEN/TC 260 (Fertilizers and liming materials).

Key topics and technical requirements

  • Scope: Extraction of phosphorus soluble in 2 % citric acid; applicable only to specified basic slag types.
  • Sample preparation: Sampling is outside this method; sample preparation and grinding for homogeneity should follow EN 1482 series.
  • Test portion: Weigh 5.000 g (nearest 0.001 g) of prepared sample into a dry 600 ml flask.
  • Reagents:
    • Distilled or demineralized water.
    • 2 % citric acid solution (20 g/l) prepared from crystallized citric acid (C6H8O7·H2O). Verification: titrate 10 ml of solution with NaOH standard (c = 0.1 mol/l) using phenolphthalein - expected consumption ~28.55 ml if correct.
  • Extraction procedure:
    • Add 500 ± 1 ml of 2 % citric acid at (20 ± 1) °C.
    • Prevent lumping by initial vigorous hand shaking; close and shake in a rotary shaker (35–40 r/min) for exactly 30 min at (20 ± 2) °C.
    • Filter immediately through a dry pleated filter free from phosphates; discard the first 20 ml of filtrate.
    • Collect sufficient filtrate for phosphorus determination and analyze according to CEN/TS 15959.
  • Apparatus: Common lab glassware, a wide-neck 600 ml flask, rotary shaker (35–40 r/min), and dry pleated phosphate-free filters.

Applications and users

  • Routine quality control and batch testing of basic slag fertilizers.
  • Analytical and testing laboratories accredited for fertilizer testing.
  • Fertilizer manufacturers ensuring product compliance with European methods.
  • Regulatory and conformity-assessment bodies verifying phosphorus availability claims.
  • Agronomists and soil amendment specialists who require standardized data on plant-available phosphorus.

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 (follow-on quantitative method).
  • Regulation (EC) No 2003/2003 - EU fertiliser regulation referenced in the standard.

Keywords: EN 15920:2011, phosphorus extraction, 2% citric acid, basic slag, fertilizer testing, CEN, extraction method, phosphorus soluble in citric acid.

Frequently Asked Questions

SIST EN 15920:2011 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Fertilizers - Extraction of phosphorus soluble in 2 % citric acid". This standard covers: This European Standard specifies the procedure for the determination of phosphorus soluble in 2 % citric acid (20 g/l). The method is applicable only to types of basic slag (see [1], Annex I A).

This European Standard specifies the procedure for the determination of phosphorus soluble in 2 % citric acid (20 g/l). The method is applicable only to types of basic slag (see [1], Annex I A).

SIST EN 15920:2011 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 15920:2011 has the following relationships with other standards: It is inter standard links to SIST-TS CEN/TS 15920:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 15920:2011 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 15920:2011 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 2-odstotni citronski kisliniDüngemittel - Extraktion des in 2%iger Citronensäure löslichen PhosphorsEngrais - Extraction du phosphore soluble dans l'acide citrique à 2 %Fertilizers - Extraction of phosphorus soluble in 2 % citric acid65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 15920:2011SIST EN 15920:2011en,fr,de01-oktober-2011SIST EN 15920:2011SLOVENSKI
STANDARDSIST-TS CEN/TS 15920:20101DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15920
June 2011 ICS 65.080 Supersedes CEN/TS 15920:2009English Version
Fertilizers - Extraction of phosphorus soluble in 2 % citric acid
Engrais - Extraction du phosphore soluble dans l'acide citrique à 2 %
Düngemittel - Extraktion des in 2%iger Citronensäure 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 15920:2011: ESIST EN 15920:2011

2 Contents Page Foreword .31 Scope .42 Normative references .43 Terms and definitions .44 Sampling .45 Principle .46 Reagents .47 Apparatus .58 Procedure .58.1 Test portion .58.2 Extraction .5Bibliography .6 SIST EN 15920:2011
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