oSIST prEN 17777:2026

SLOVENSKI STANDARD
01-marec-2026
Organska in organsko-mineralna gnojila - Določanje specifičnih elementov
Organic and organo-mineral fertilizers - Determination of specific elements
Organische und organisch-mineralische Düngemittel - Bestimmung spezifischer
Elemente
Engrais organiques et organo-minéraux - Dosage des éléments spécifiques
Ta slovenski standard je istoveten z: prEN 17777
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
February 2026
ICS 65.080 Will supersede CEN/TS 17777:2022
English Version
Organic and organo-mineral fertilizers - Determination of
specific elements
Engrais organiques et organo-minéraux - Dosage des Organische und organisch-mineralische Düngemittel -
éléments spécifiques Bestimmung spezifischer Elemente
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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17777:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 7
3 Terms and definitions . 8
4 Sampling and sample preparation . 8
5 Determination of specific elements . 8
5.1 Total phosphorus content. 8
5.2 Total potassium content . 8
5.3 Total calcium content . 8
5.4 Total magnesium content . 8
5.5 Total sodium content . 8
5.6 Total sulphur content . 8
5.7 Inorganic arsenic content . 8
5.8 Cadmium content . 8
5.9 Total chromium content . 9
5.10 Total mercury content . 9
5.11 Total nickel content . 9
5.12 Total lead content . 9
5.13 Total copper content . 9
5.14 Total zinc content . 9
5.15 Water-soluble calcium content . 9
5.16 Water-soluble magnesium content . 9
5.17 Water-soluble sodium content . 9
5.18 Water-soluble sulphur content . 9
5.19 Water-soluble phosphorus content . 9
5.20 Water-soluble potassium content . 9
5.21 Neutral ammonium citrate soluble phosphorus content . 9
5.22 Formic acid soluble phosphorus content . 10
5.23 Total boron content . 10
5.24 Total cobalt content . 10
5.25 Total iron content . 10
5.26 Total manganese content . 10
5.27 Total molybdenum content . 10
5.28 Water-soluble boron content . 10
5.29 Water-soluble cobalt content . 10
5.30 Water-soluble copper content . 10
5.31 Water-soluble iron content . 10
5.32 Water-soluble manganese content . 10
5.33 Water-soluble molybdenum content . 10
5.34 Water-soluble zinc content . 10
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Regulation (EU) 2019/1009 making available on the market of EU
fertilising products aimed to be covered . 11
Bibliography . 18

European foreword
This document (prEN 17777:2026) 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 the CEN Enquiry.
This document will supersede CEN/TS 17777:2022.
Compared to the previous edition, prEN 17777:2026 includes the following significant technical changes:
— the CEN Technical Specification has been adopted as a European Standard including the addition of
Annex ZA;
— Scope (Clause 1) updated including a clarification on fertilizing product blends.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
Introduction
Regulation (EU) 2019/1009 [1] lays down the rules on the making available on the market of EU
fertilizing products and the specific safety and quality requirements for the defined product function
categories (PFCs). Organic and organo-mineral have been classified as PFC 1 (A) and PFC 1 (B)
In order to measure the compliance with the related requirements of the Regulation (EU) 2019/1009 [1]
relevant test methods have to be defined in harmonized standards. In this document the normative
references of the test methods to be used for organic and organo-mineral fertilizers are defined in order
to measure the compliance with the related requirement in the Regulation (EU) 2019/1009 [1].

1 Scope
This document specifies references to the methods for the determination of the following specific
elements in organic and organo-mineral fertilizers:
— determination of the total phosphorus content;
— determination of the total potassium content;
— determination of the total calcium content;
— determination of the total magnesium content;
— determination of the total sodium content;
— determination of the total sulphur content;
— determination of the inorganic arsenic content;
— determination of the cadmium content;
— determination of the total chromium content;
— determination of the total mercury content;
— determination of the total nickel content;
— determination of the total lead content;
— determination of the total copper content;
— determination of the total zinc content;
— determination of the water-soluble calcium content;
— determination of the water-soluble magnesium content;
— determination of the water-soluble sodium content;
— determination of the water-soluble sulphur content.
This document specifies references to the methods for the determination of the following specific
elements in organo-mineral fertilizers:
— determination of the water-soluble phosphorus content;
— determination of the water-soluble potassium content;
— determination of the neutral ammonium citrate soluble phosphorus content;
— determination of the formic acid soluble phosphorus content;
— determination of the total boron content;
— determination of the total cobalt content;
— determination of the total iron content;
— determination of the total manganese content;
— determination of the total molybdenum content;
— determination of the water-soluble boron content;
— determination of the water-soluble cobalt content;
— determination of the water-soluble copper content;
— determination of the water-soluble iron content;
— determination of the water-soluble manganese content;
— determination of the water-soluble molybdenum content;
— determination of the water-soluble zinc content.
The scope of the standards referenced in this document specifies in which cases the method is also
applicable to fertilizing product blends.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
prEN 12944-1:2026, Fertilizers, liming materials and inhibitors — Vocabulary — Part 1: General terms
prEN 12944-2:2026, Fertilizers, liming materials and inhibitors — Vocabulary — Part 2: Terms relating to
fertilizers
prEN 17766:2025, Organic and organo-mineral fertilizers — Extraction by water for subsequent
determination of elements
prEN 17767:2026, Organo-mineral fertilizers — Extraction of phosphorus by formic acid
prEN 17768:2026, Organic and organo-mineral fertilizers — Digestion by aqua regia for subsequent
determination of elements
prEN 17769:2026, Organic and organo-mineral fertilizers — Determination of the mercury content
prEN 17770:2026, Organic and organo-mineral fertilizers — Determination of total content of specific
elements by ICP-AES after digestion by aqua regia
prEN 17774:2026, Organic and organo-mineral fertilizers — Determination of the content of specific
elements by ICP-AES after extraction by water and weak solvents
prEN 17775:2026, Organic and organo-mineral fertilizers — Determination of the inorganic arsenic
content
prEN 17779:2026, Organo-mineral fertilizers — Extraction of phosphorus soluble in a neutral ammonium
citrate solution
3 Terms and definitions
For the purposes of this document, the terms and definitions given in prEN 12944-1:2026 and
prEN 12944-2:2026 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
4 Sampling and sample preparation
Sampling an
...