prEN 17752

SLOVENSKI STANDARD
01-marec-2026
Anorganska gnojila - Določanje specifičnih inhibitorjev
Inorganic fertilizers - Determination of specific inhibiting compounds
Anorganische Düngemittel - Bestimmung spezifischer Hemmstoffe
Engrais inorganiques - Détermination des composés inhibiteurs spécifiques
Ta slovenski standard je istoveten z: prEN 17752
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
January 2026
ICS 65.080 Will supersede CEN/TS 17752:2022
English Version
Inorganic fertilizers - Determination of specific inhibiting
compounds
Engrais inorganiques - Détermination des composés Anorganische Düngemittel - Bestimmung spezifischer
inhibiteurs spécifiques Hemmstoffe
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 17752:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Sampling and sample preparation . 6
4.1 Sampling . 6
4.2 Sample preparation . 6
5 Determination of specific inhibiting compounds . 6
5.1 Determination of the nitrification inhibiting compound content . 6
5.1.1 Determination of dicyandiamide . 6
5.1.2 Determination of 3-methylpyrazole (MP) . 6
5.1.3 Determination of 1H-1,2,4-triazole . 6
5.1.4 Determination of 3,4-dimethyl-1H-pyrazole phosphate (DMPP) . 6
5.1.5 Determiantion of 2-(3,4-dimethyl-pyrazol-1-yl)-succinic acid (DMPSA) . 6
5.2 Determination of the urease inhibiting compound content . 7
5.2.1 Determination of N-(n-butyl)thiophosphoric triamide (NBPT) . 7
5.2.2 Determination of N-(2-nitrophenyl)phosphoric triamide (2-NPT) . 7
5.2.3 Determination of N-(n-butyl)thiophosphoric triamide (NBPT) and N-(n-
propyl)thiophosphoric triamide (NPPT) . 7
Annex ZA (informative) Relationship of 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 . 8
Bibliography . 9

European foreword
This document (prEN 17752:2026) 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 CEN Enquiry.
This document will supersede CEN/TS 17752:2022.
Compared to the previous edition, prEN 17752:2025 includes the following significant technical changes:
a) the CEN Technical Specification has been adopted as a European Standard including the addition of
Annex ZA;
b) the Scope (Clause 1) has been updated with respect to fertilizing product blends;
c) the normative references (Clause 2) and the Bibliography have been updated.
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). Inorganic fertiliziers have been classified into PFC 1(C).
The specific safety and quality requirements 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 parameter in the
Regulation (EU) 2019/1009 [1].
...