oSIST prEN 15957:2026

SLOVENSKI STANDARD
01-februar-2026
Anorganska gnojila - Ekstrakcija fosforja, topnega v amonijevem citratu v
nevtralnem mediju
Inorganic fertilizers - Extraction of phosphorus which is soluble in neutral ammonium
citrate
Anorganische Düngemittel - Extraktion des in neutralem Ammoniumcitrat löslichen
Phosphors
Engrais inorganiques - Extraction du phosphore soluble dans du citrate d’ammonium
neutre
Ta slovenski standard je istoveten z: prEN 15957
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2025
ICS 65.080 Will supersede EN 15957:2011
English Version
Inorganic fertilizers - Extraction of phosphorus which is
soluble in neutral ammonium citrate
Engrais inorganiques - Extraction du phosphore Anorganische Düngemittel - Extraktion des in
soluble dans du citrate d'ammonium neutre neutralem Ammoniumcitrat löslichen Phosphors
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 15957:2025 E
worldwide for CEN national Members.

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 Extraction . 5
9 Test report . 6
Bibliography . 7

European foreword
This document (prEN 15957:2025) has been prepared by Technical Committee CEN/TC 260 “Fertilizers
and liming materials”, the secretariat of which is held by DIN.
This document is currently submitted to CEN Enquiry.
This document will supersede EN 15957:2011.
This document includes the following significant technical changes with respect to EN 15957:2011:
a) characteristics of distilled water added;
b) reference to Regulation (EC) No 2003/2003 removed.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States sub
...