CEN/TS 17757:2022

Inorganic fertilizers - Determination of specific nutrients

This document specifies references to methods for the determination of the content of the following specific nutrients in inorganic fertilizers:
-   the total nitrogen content;
-   the ammoniacal nitrogen content;
-   the nitric nitrogen content;
-   the urea nitrogen content;
-   the content of nitrogen from isobutylidenediurea (IBDU) and crotonylidenediurea (CDU);
-   the cyanamide nitrogen content;
-   the methylene-urea nitrogen content (and urea formaldehyde, if applicable);
-   the total phosphorus content;
-   the water-soluble phosphorus content;
-   the neutral ammonium citrate soluble phosphorus content;
-   the water-soluble potassium content;
-   the total magnesium content;
-   the water-soluble magnesium content;
-   the total calcium content;
-   the water-soluble calcium content;
-   the total sulfur content;
-   the water-soluble sulfur content;
-   the total sodium content;
-   the water-soluble sodium content.
This document is applicable to EU fertilizing products classified as PFC 1(C) and PFC 7 as long as the blend only consists of EU fertilizing products classified as PFC 1(C), PFC 2 and PFC 5 as specified in the Regulation (EU) 2019/1009 [1].

Anorganische Düngemittel - Bestimmung spezifischer Nährstoffe

Dieses Dokument legt Verweisungen auf Verfahren zur Bestimmung der folgenden spezifischen, in anorganischen Düngemitteln enthaltenen Nährstoffe fest:
—   Gesamtgehalt an Stickstoff;
—   Gehalt an Ammoniumstickstoff;
—   Gehalt an Nitratstickstoff;
—   Gehalt an Harnstoffstickstoff;
—   Gehalt an Stickstoff aus Isobutylidendiharnstoff (IBDU, en: isobutylidenediurea) und Crotonylidendiharnstoff (CDU, en: crotonylidenediurea);
—   Gehalt an Cyanamidstickstoff;
—   Gehalt an Stickstoff aus Methylenharnstoff (und Formaldehydharnstoff, sofern zutreffend);
—   Gesamtgehalt an Phosphor;
—   Gehalt an wasserlöslichem Phosphor;
—   Gehalt an neutral-ammoncitratlöslichem Phosphor;
—   Gehalt an wasserlöslichem Kalium;
—   Gesamtgehalt an Magnesium;
—   Gehalt an wasserlöslichem Magnesium;
—   Gesamtgehalt an Calcium;
—   Gehalt an wasserlöslichem Calcium;
—   Gesamtgehalt an Schwefel;
—   Gehalt an wasserlöslichem Schwefel;
—   Gesamtgehalt an Natrium;
—   Gehalt an wasserlöslichem Natrium.
Dieses Dokument ist anwendbar auf EU Düngeprodukte der Kategorien PFC 1(C) und PFC 7, vorausgesetzt, die Mischung besteht ausschließlich aus EU Düngeprodukten der Kategorie PFC 1(C), PFC 2 und PFC 5 der Verordnung (EU) 2019/1009 [1].

Engrais inorganiques - Détermination des éléments nutritifs spécifiques

Le présent document spécifie les références aux méthodes de détermination de la teneur en éléments nutritifs spécifiques suivants dans les engrais inorganiques :
-   la teneur en azote total ;
-   la teneur en azote ammoniacal ;
-   la teneur en azote nitrique ;
-   la teneur en azote uréique ;
-   la teneur en azote de l'isobutylidène diurée (IBDU) et de la crotonylidène diurée (CDU) ;
-   la teneur en azote cyanamidé ;
-   la teneur en azote du méthylène-urée (et de l'urée-formaldéhyde, le cas échéant) ;
-   la teneur en phosphore total ;
-   la teneur en phosphore soluble dans l'eau ;
-   la teneur en phosphore soluble dans le citrate d'ammonium neutre ;
-   la teneur en potassium soluble dans l'eau ;
-   la teneur en magnésium total ;
-   la teneur en magnésium soluble dans l'eau ;
-   la teneur en calcium total ;
-   la teneur en calcium soluble dans l'eau ;
-   la teneur en soufre total ;
-   la teneur en soufre soluble dans l'eau ;
-   la teneur en sodium total ;
-   la teneur en sodium soluble dans l'eau.
Le présent document est applicable aux fertilisants UE classés en PFC 1(C) et PFC 7 tant que la combinaison ne se compose que de fertilisants UE classés en PFC 1(C), PFC 2 et PFC 5, comme spécifié dans le règlement (UE) 2019/1009 [1].

Anorganska gnojila - Določevanje specifičnih hranil

Ta dokument navaja metode za določevanje vsebnosti naslednjih specifičnih hranil v anorganskih gnojilih:
–   skupna vsebnost dušika;
–   vsebnost dušika v obliki amonijaka;
–   vsebnost nitratnega dušika;
–   vsebnost sečninskega dušika;
–   vsebnost dušika iz sečninskega formaldehida, IBDU in CDU;
–   vsebnost cianamidnega dušika;
–   vsebnost metilen-sečninskega dušika;
–   skupna vsebnost P2O5;
–   vsebnost v vodi topnega P2O5;
–   vsebnost P2O5, topnega v nevtralnem amonijevem citratu;
–   vsebnost P2O5, topnega v metanojski kislini;
–   skupna vsebnost K2O;
–   vsebnost v vodi topnega K2O;
–   skupna vsebnost MgO;
–   vsebnost v vodi topnega MgO;
–   skupna vsebnost CaO;
–   vsebnost v vodi topnega CaO;
–   skupna vsebnost SO3;
–   vsebnost v vodi topnega SO3;
–   skupna vsebnost Na2O;
–   vsebnost v vodi topnega Na2O.

General Information

• Status: Published
• Publication Date: 05-Apr-2022
• ICS: 65.080 - Fertilizers
• Technical Committee: CEN/TC 260 - Fertilizers and liming materials
• Drafting Committee: CEN/TC 260/WG 7 - Chemical analysis
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 06-Apr-2022
• Due Date: 01-Jul-2022
• Completion Date: 06-Apr-2022
• Directive: 2019/1009 - Regulation (EU) 2019/1009 of the European Parliament and of the Council of 5 June 2019 laying down rules on the making available on the market of EU fertilising products and amending Regulations (EC) No 1069/2009 and (EC) No 1107/2009 and repealing Regulation (EC) No 2003/2003
• Mandate: M/564 - Fertilising products in support of Regulation (EU) 2019/1009
• Ref Project: SIST-TS CEN/TS 17757:2023 - Inorganic fertilizers - Determination of specific nutrients

Overview

CEN/TS 17757:2022 - "Inorganic fertilizers - Determination of specific nutrients" - is a CEN Technical Specification that lists and references standardized test methods for measuring targeted nutrient contents in inorganic fertilizers. It provides the normative references laboratories and manufacturers should use to determine nutrient fractions such as total and water‑soluble forms of nitrogen, phosphorus, potassium, magnesium, calcium, sulfur and sodium. The TS supports compliance with Regulation (EU) 2019/1009 for EU fertilizing products (notably PFC 1(C) and PFC 7 blends containing PFC 1(C), PFC 2 and PFC 5).

Key topics and technical requirements

• Scope: Specifies the analytical targets - e.g., total nitrogen, ammoniacal, nitric, urea, cyanamide, IBDU/CDU and methylene‑urea nitrogen; total and water‑soluble phosphorus; neutral ammonium citrate soluble phosphorus; water‑soluble potassium; total and water‑soluble magnesium, calcium, sulfur and sodium.
• Referenced methods: Declares existing EN standards for extraction and determination (sampling/sample prep per EN 1482 series). Examples include EN 15475 (ammoniacal N), EN 15604 (different N forms), EN 15705 (IBDU/CDU by HPLC), EN 15956–15959 (phosphorus extraction/determination), EN 15477 (water‑soluble K), EN 15960/15961 (total and water‑soluble Ca/Mg/Na/S) and EN 15749 (sulfate determination).
• Sampling & sample preparation: Requires representative sampling according to EN 1482 parts 1–3 and sample preparation per EN 1482‑2.
• Regulatory alignment: Enables measurement approaches for demonstrating conformity with Regulation (EU) 2019/1009. Note: some methods report results in mg/kg and may require conversion to percentage mass fractions for regulatory reporting.

Applications and users

• Who uses it:
  • Accredited testing laboratories performing fertilizer analysis
  • Fertilizer manufacturers and formulators for quality control and product specification
  • Regulatory authorities and market surveillance bodies verifying compliance with EU fertilizing product rules
  • Research institutions and agronomic service providers analyzing nutrient release and solubility
• Practical uses:
  • Routine quality-control testing and batch release of inorganic fertilizers
  • Verification of nutrient declarations on labels and safety/quality dossiers
  • Characterization of water‑soluble vs. total nutrient fractions for agronomic performance and environmental assessment
  • Harmonizing test methods across EU member states for consistent market surveillance

Related standards

• Regulation (EU) 2019/1009 - EU fertilizing products
• EN 1482 series - Sampling and sample preparation
• EN 15475, EN 15604, EN 15705, EN 15956–15961, EN 16196–16199 - referenced analytical methods

CEN/TS 17757:2022 functions as a practical roadmap to the accepted EN test methods for nutrient determination in inorganic fertilizers, helping laboratories and manufacturers meet EU regulatory and quality requirements.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2023
Anorganska gnojila - Določevanje specifičnih hranil
Inorganic fertilizers - Determination of specific nutrients
Anorganische Düngemittel - Bestimmung spezifischer Nährstoffe
Engrais inorganiques - Détermination des éléments nutritifs spécifiques
Ta slovenski standard je istoveten z: CEN/TS 17757:2022
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 17757
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
April 2022
TECHNISCHE SPEZIFIKATION
ICS 65.080
English Version
Inorganic fertilizers - Determination of specific nutrients
Engrais inorganiques - Détermination des éléments Anorganische Düngemittel - Bestimmung spezifischer
nutritifs spécifiques Nährstoffe
This Technical Specification (CEN/TS) was approved by CEN on 13 March 2022 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

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, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17757:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 6
3 Terms and definitions . 7
4 Sampling and sample preparation . 7
4.1 Sampling . 7
4.2 Sample preparation . 7
5 Methods for extraction and determination of specific nutrients . 7
5.1 Total nitrogen content . 7
5.2 Ammoniacal nitrogen . 8
5.3 Nitric nitrogen . 8
5.4 Urea nitrogen content . 8
5.5 Content of nitrogen from IBDU and CDU . 8
5.6 Cyanamide nitrogen content . 8
5.7 Methylene-urea and urea formaldehyde nitrogen content . 8
5.8 Phosphorus content . 8
5.9 Potassium content . 8
5.10 Magnesium content . 8
5.11 Calcium content . 9
5.12 Sulfur content . 9
5.13 Sodium content . 9
Bibliography . 10

European foreword
This document (CEN/TS 17757:2022) has been prepared by Technical Committee CEN/TC 260
“Fertilizers and liming materials”, the secretariat of which is held by DIN.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a standardization request given to CEN by the European
Commission and the European Free Trade Association.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to announce this Technical Specification: 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, Turkey and the United
Kingdom.
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). Inorganic fertilizers have been classified into PFC 1(C).
The specific safety and quality requirements in relation to the following specific nutrients are defined in
this document as well as normative references of the test methods to be used in order to measure the
compliance with the related requirement in the Regulation (EU) 2019/1009 [1].

1 Scope
This document specifies references to methods for the determination of the content of the following
specific nutrients in inorganic fertilizers:
— the total nitrogen content;
— the ammoniacal nitrogen content;
— the nitric nitrogen content;
— the urea nitrogen content;
— the content of nitrogen from isobutylidenediurea (IBDU) and crotonylidenediurea (CDU);
— the cyanamide nitrogen content;
— the methylene-urea nitrogen content (and urea formaldehyde, if applicable);
— the total phosphorus content;
— the water-soluble phosphorus content;
— the neutral ammonium citrate soluble phosphorus content;
— the water-soluble potassium content;
— the total magnesium content;
— the water-soluble magnesium content;
— the total calcium content;
— the water-soluble calcium content;
— the total sulfur content;
— the water-soluble sulfur content;
— the total sodium content;
— the water-soluble sodium content.
This document is applicable to EU fertilizing products classified as PFC 1(C) and PFC 7 as long as the
blend only consists of EU fertilizing products classified as PFC 1(C), PFC 2 and PFC 5 as specified in the
Regulation (EU) 2019/1009 [1].
2 Normative references
T
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