CEN/TS 17752:2022

Inorganic fertilizers - Determination of specific inhibitors

This document specifies references to the methods for the determination of nitrification inhibitors and urease inhibitors in inorganic fertilizers.
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 Hemmstoffe

Dieses Dokument legt Verweisungen auf Verfahren zur Bestimmung von in anorganischen Düngemitteln enthaltenen Nitrifikationshemmstoffen und Ureasehemmstoffen fest.
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 inhibiteurs spécifiques

Le présent document spécifie les références des méthodes de détermination des inhibiteurs de nitrification et des inhibiteurs d'uréase dans les engrais inorganiques.
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 inhibitorjev

Ta dokument navaja metode za določevanje vsebnosti inhibitorja nitrifikacije, vsebnosti inhibitorja denitrifikacije in vsebnosti inhibitorja ureaze v anorganskih gnojilih.

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: 26-Jun-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 17752:2023 - Inorganic fertilizers - Determination of specific inhibitors

Overview

CEN/TS 17752:2022 is a European Technical Specification developed by the European Committee for Standardization (CEN) that outlines standardized methods for determining specific inhibitors in inorganic fertilizers. This document primarily focuses on the quantitative analysis of nitrification inhibitors and urease inhibitors, which are critical additives used to enhance fertilizer efficacy and reduce environmental impact.

This standard applies specifically to inorganic fertilizers classified under EU fertilizing product function categories (PFC) 1(C) and 7, provided that the product blends adhere to compositions specified by Regulation (EU) 2019/1009. By offering harmonized testing methods, CEN/TS 17752:2022 supports compliance with EU safety and quality requirements for fertilizing products.

Key Topics

• Scope: Specifies methods for detecting and quantifying nitrification inhibitors and urease inhibitors in inorganic fertilizers within defined EU PFC categories.

• Sampling and Sample Preparation: Ensures representative sampling according to EN 1482 series, including sampling of static heaps and proper sample preparation techniques to maintain accuracy in testing.

• Nitrification Inhibitors Determination: Methods included for the analysis of:

  • Dicyandiamide (EN 15360:2007)
  • 3-Methylpyrazole (MP) (EN 15905:2010)
  • 1H-1,2,4-Triazole (EN 16024:2011)
  • 3,4-Dimethyl-1H-pyrazole phosphate (DMPP) (EN 16328:2012)
  • 2-(3,4-Dimethyl-pyrazol-1-yl)-succinic acid (DMPSA) (EN 17090:2018)

  These inhibitors slow down the nitrification process, minimizing nitrogen loss through leaching and greenhouse gas emissions.

• Urease Inhibitors Determination: Covers methods for measuring:

  • N-(n-butyl)thiophosphoric triamide (NBPT) (EN 15688:2008)
  • N-(2-nitrophenyl)phosphoric triamide (2-NPT) (EN 16075:2011)
  • Both NBPT and N-(n-propyl)thiophosphoric triamide (NPPT) together (EN 16651:2015)

  These inhibitors reduce ammonia volatilization from urea-based fertilizers, improving nitrogen use efficiency.

• Regulatory Compliance: Assists manufacturers and laboratories in aligning their product testing with the Regulation (EU) 2019/1009, which governs the market placement and safety criteria for fertilizing products in the European Union.

Applications

• Quality Control in Fertilizer Production: Enables consistent and accurate testing to verify the presence and concentration of specific inhibitors, ensuring product reliability and performance.

• Regulatory Certification: Facilitates compliance with EU fertilizing product regulations, helping manufacturers meet legal standards for market authorization.

• Environmental Impact Mitigation: Supports the use of inhibitors that reduce nitrogen losses to the environment, contributing to sustainable agriculture and reduced greenhouse gas emissions.

• Research and Development: Provides standardized analytical methods to evaluate new inhibitor formulations or fertilizer blends for effectiveness and safety.

• Agricultural Stakeholders: Assists agronomists, regulators, and quality assurance professionals in monitoring fertilizer inputs and optimizing nutrient management strategies.

Related Standards

• EN 1482 Series - Sampling and sample preparation of fertilizers and liming materials.

• EN 12944 Parts 1 & 2 - Vocabulary and terms related to fertilizers.

• Specific inhibitor determination methods, including:

  • EN 15360: Dicyandiamide determination
  • EN 15688: NBPT content determination
  • EN 15905: 3-Methylpyrazole determination
  • EN 16024: 1H-1,2,4-Triazole analysis
  • EN 16075: 2-NPT determination
  • EN 16328: DMPP measurement
  • EN 16651: Combined NBPT and NPPT measurement
  • EN 17090: DMPSA assay

• Regulation (EU) 2019/1009 - Lays down rules for the marketing and safety of EU fertilizing products, defining relevant product function categories (PFCs).

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By implementing the methods defined in CEN/TS 17752:2022, fertilizer producers and testing labs can ensure consistent analysis of nitrification and urease inhibitors, meeting EU regulatory requirements while promoting sustainable fertilization practices. The standard is essential for maintaining quality control, regulatory compliance, and advancing environmentally responsible fertilizer technologies.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2023
Anorganska gnojila - Določevanje specifičnih inhibitorjev
Inorganic fertilizers - Determination of specific inhibitors
Anorganische Düngemittel - Bestimmung spezifischer Hemmstoffe
Engrais inorganiques - Détermination des inhibiteurs spécifiques
Ta slovenski standard je istoveten z: CEN/TS 17752:2022
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 17752
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
April 2022
TECHNISCHE SPEZIFIKATION
ICS 65.080
English Version
Inorganic fertilizers - Determination of specific inhibitors
Engrais inorganiques - Détermination des inhibiteurs Anorganische Düngemittel - Bestimmung spezifischer
spécifiques Hemmstoffe
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 17752:2022 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 inhibitors . 6
5.1 Determination of the nitrification inhibitor 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 inhibitor 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
Bibliography . 8

European foreword
This document (CEN/TS 17752:2022) 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,
...