CEN/TS 17779:2022

Organo-mineral fertilizers - Extraction of phosphorus, which is soluble in neutral ammonium citrate

This document specifies a method for the extraction of phosphorus soluble in neutral ammonium citrate.
The method is applicable to organo-mineral fertilizers.

Organisch-mineralische Düngemittel - Extraktion von Phosphor, der in neutralem Ammoniumcitrat löslich ist

Dieses Dokument legt ein Verfahren zur Extraktion von Phosphor fest, der in neutralem Ammoniumcitrat löslich ist.
Das Verfahren ist auf organisch-mineralische Düngemittel anwendbar.

Engrais organo-minéraux - Extraction du phosphore, qui est soluble dans le citrate d'ammonium neutre

Le présent document spécifie une méthode d’extraction du phosphore soluble dans le citrate d’ammonium neutre.
La méthode est applicable aux engrais organo-minéraux.

Organsko-mineralna gnojila - Ekstrakcija fosforja, topnega v nevtralnem amonijevem citratu

Dokument vzpostavlja metodologijo za ekstrakcijo fosforja, topnega v nevtralnem amonijevem citratu, v organsko-mineralnih 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 8 - Organic and organo-mineral fertilizers
• Current Stage: 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
• Start Date: 03-Jun-2025
• Completion Date: 23-Sep-2025
• 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 17779:2023 - Organo-mineral fertilizers - Extraction of phosphorus, which is soluble in neutral ammonium citrate

Overview

CEN/TS 17779:2022 is a European Technical Specification established by the European Committee for Standardization (CEN). This standard specifies a precise analytical method for extracting phosphorus that is soluble in neutral ammonium citrate from organo-mineral fertilizers. Designed to support accurate phosphorus quantification, the method facilitates the use of ICP-AES (Inductively Coupled Plasma Atomic Emission Spectrometry) for subsequent phosphorus determination. The standard applies specifically to organo-mineral fertilizers and ensures consistent, reliable phosphorus extraction under controlled conditions.

Key Topics

• Scope: Defines the method for extracting phosphorus soluble in neutral ammonium citrate from organo-mineral fertilizers.
• Extraction Principle: Extraction is carried out at 65 °C using a neutral ammonium citrate (pH 7) solution.
• Sample Preparation: Sampling follows principles outlined in EN 1482, adapted for organo-mineral fertilizers.
• Reagent Preparation: Detailed preparation of neutral ammonium citrate solution, including exact pH adjustment with ammonium hydroxide to maintain neutrality at 20 °C.
• Apparatus Needed:
  • Beakers (2 L capacity)
  • Erlenmeyer flasks (200 ml - 250 ml)
  • pH-meter for solution calibration
  • Thermostatically controlled water bath at 65 ± 2 °C with stirrer
  • Phosphate-free dry pleated filters
• Extraction Procedure:
  • Accurate weighing of test portions (1 g or 3 g)
  • Heating ammonium citrate solution and mixing with the test sample
  • Incubation with stirring for exactly 1 hour
  • Cooling and quantitative dilution
  • Filtration and collection of clear filtrate for phosphorus analysis
• Phosphorus Determination: The extracted phosphorus is determined as per CEN/TS 17774 using ICP-AES.

Applications

This standard is critical for laboratories and manufacturers involved in the production, quality control, and regulatory compliance of organo-mineral fertilizers. Key practical applications include:

• Quality Assurance: Enables accurate measurement of phosphorus availability in fertilizers to meet regulatory and market requirements.
• Research and Development: Assists in evaluating phosphorus solubility and bioavailability in novel organo-mineral fertilizer formulations.
• Environmental Compliance: Helps assess nutrient release characteristics, supporting sustainable fertilizer use and reducing environmental impact.
• Regulatory Reporting: Provides standardized methodology aligned with European regulations for fertilizer nutrient content declarations.
• Agricultural Optimization: Supports agronomists and soil scientists in selecting appropriate fertilizers based on phosphorus solubility.

Related Standards

• CEN/TS 17774: Specifies the determination of specific elements, including phosphorus, by ICP-AES after extraction by water. This method complements CEN/TS 17779 by detailing the analytical detection technique post-extraction.
• EN 1482 (all parts): Provides guidelines for sampling and sample preparation of fertilizers and liming materials, ensuring representativeness and reproducibility.
• Other Fertilizer Standards under CEN/TC 260: These standards cover various fertilizers and liming materials, establishing consistent testing and labeling requirements across Europe.

Keywords

Organo-mineral fertilizers, phosphorus extraction, neutral ammonium citrate, CEN/TS 17779, phosphorus solubility, fertilizer analysis, ICP-AES, phosphorus determination, fertilizer quality control, European fertilizer standards, nutrient extraction method.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2023
Organsko-mineralna gnojila - Ekstrakcija fosforja, topnega v nevtralnem
amonijevem citratu
Organo-mineral fertilizers - Extraction of phosphorus, which is soluble in neutral
ammonium citrate
Organisch-mineralische Düngemittel - Extraktion von Phosphor, der in neutralem
Ammoniumcitrat löslich ist
Engrais organo-minéraux - Extraction du phosphore, qui est soluble dans le citrate
d'ammonium neutre
Ta slovenski standard je istoveten z: CEN/TS 17779:2022
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 17779
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
April 2022
TECHNISCHE SPEZIFIKATION
ICS 65.080
English Version
Organo-mineral fertilizers - Extraction of phosphorus,
which is soluble in neutral ammonium citrate
Engrais organo-minéraux - Extraction du phosphore, Organisch-mineralische Düngemittel - Extraktion von
qui est soluble dans le citrate d'ammonium neutre Phosphor, der in neutralem Ammoniumcitrat (NAC)
löslich ist, zur anschließenden Bestimmung von P
durch ICP-AES
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 17779:2022 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 . 4
6 Reagents . 4
7 Apparatus . 5
8 Procedure. 5
Bibliography . 6

European Foreword
This document (CEN/TS 17779:2022) has been prepared by the 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.
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