CEN/TS 17767:2022
(Main)Organo-mineral fertilizers - Extraction of phosphorus by formic acid
Organo-mineral fertilizers - Extraction of phosphorus by formic acid
This document specifies the procedure for the extraction of phosphorus in 2 % formic acid (20 g/l), representing the amount of soft natural phosphates.
The method is applicable to organo-mineral fertilizers.
Organisch-mineralische Düngemittel - Extraktion von Phosphor durch Ameisensäure
Dieses Dokument legt das Verfahren zur Extraktion von Phosphor in 2%iger Ameisensäure (20 g/l) fest, was der Menge an weichen natürlichen Phosphaten entspricht.
Das Verfahren ist auf organisch-mineralische Düngemittel anwendbar.
Engrais organo-minéraux - Extraction du phosphore par l'acide formique
Le présent document spécifie le mode opératoire d’extraction du phosphore dans de l’acide formique à 2 % (20 g/l), représentant la quantité de phosphates naturels tendres.
La méthode est applicable aux engrais organo-minéraux.
Organsko-mineralna gnojila - Ekstrakcija fosforja z metanojsko kislino
Ta dokument vzpostavlja metodologijo za ekstrakcijo fosforja z metanojsko kislino za kasnejše določanje P v organsko-mineralnih gnojilih.
General Information
- Status
- Published
- Publication Date
- 05-Apr-2022
- 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
Overview
CEN/TS 17767:2022 specifies a laboratory procedure for the extraction of phosphorus from organo-mineral fertilizers using 2 % formic acid (20 g/L). The extraction quantifies the fraction of phosphorus that is soluble in formic acid and therefore represents the amount associated with soft natural phosphates. This CEN Technical Specification is intended for provisional application across CEN member countries and supports consistent testing and classification of phosphorus in organo‑mineral fertilizers.
Key topics and technical requirements
- Scope and principle
- Targets organo‑mineral fertilizers; distinguishes phosphorus from soft versus hard natural phosphates by solubility in formic acid.
- Reagents
- 2 % formic acid (20 g/L): prepare by making up 82 mL concentrated formic acid (98–100 %, ρ ≈ 1.22 g/mL) to 5 L with distilled or demineralized water.
- Use distilled or demineralized water throughout.
- Sample and apparatus
- Weigh 5 g test portion to nearest 0.001 g into a 500 mL wide‑neck graduated flask (e.g., Stohmann).
- Use common laboratory glassware, a rotary shaker (35–40 turns/min), and a dry pleated filter free from phosphates.
- Extraction procedure
- Add formic acid at (20 ± 1) °C to ~1 cm below the graduation mark while rotating the flask, make up to volume, close and shake 30 minutes at (20 ± 2) °C.
- Filter, discard the first portion of filtrate, collect sufficient filtrate for analysis.
- Extracts may be stored at (4 ± 2) °C for up to two days before determination.
- Analysis
- Phosphorus concentration after extraction is determined according to CEN/TS 17774 (ICP‑AES after extraction).
- Sampling guidance
- Sampling should follow EN 1482 principles with adaptations for organic and organo‑mineral fertilizers.
Applications and users
This method is practical for:
- Quality control laboratories in fertilizer production verifying P availability fractions.
- Fertilizer manufacturers classifying products and ensuring compliance with declaration requirements.
- Regulatory bodies and certification schemes assessing the composition of organo‑mineral fertilizers.
- Research laboratories studying phosphorus speciation and bioavailability in fertilizer matrices.
Keywords: CEN/TS 17767:2022, organo-mineral fertilizers, phosphorus extraction, formic acid extraction, 2% formic acid, soft natural phosphates, fertilizer testing, ICP-AES.
Related standards
- CEN/TS 17774 - Determination of specific elements by ICP‑AES after extraction (referenced for phosphorus measurement).
- EN 1482 (all parts) - Sampling and sample preparation for fertilizers and liming materials.
Frequently Asked Questions
CEN/TS 17767:2022 is a technical specification published by the European Committee for Standardization (CEN). Its full title is "Organo-mineral fertilizers - Extraction of phosphorus by formic acid". This standard covers: This document specifies the procedure for the extraction of phosphorus in 2 % formic acid (20 g/l), representing the amount of soft natural phosphates. The method is applicable to organo-mineral fertilizers.
This document specifies the procedure for the extraction of phosphorus in 2 % formic acid (20 g/l), representing the amount of soft natural phosphates. The method is applicable to organo-mineral fertilizers.
CEN/TS 17767:2022 is classified under the following ICS (International Classification for Standards) categories: 65.080 - Fertilizers. The ICS classification helps identify the subject area and facilitates finding related standards.
CEN/TS 17767:2022 is associated with the following European legislation: EU Directives/Regulations: 2019/1009; Standardization Mandates: M/564. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
CEN/TS 17767:2022 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2023
Organsko-mineralna gnojila - Ekstrakcija fosforja z metanojsko kislino
Organo-mineral fertilizers - Extraction of phosphorus by formic acid
Organisch-mineralische Düngemittel - Extraktion von Phosphor durch Ameisensäure
Engrais organo-minéraux - Extraction du phosphore par l'acide formique
Ta slovenski standard je istoveten z: CEN/TS 17767:2022
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CEN/TS 17767
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
April 2022
TECHNISCHE SPEZIFIKATION
ICS 65.080
English Version
Organo-mineral fertilizers - Extraction of phosphorus by
formic acid
Engrais organo-minéraux - Extraction du phosphore Organisch-mineralische Düngemittel - Extraktion von
par l'acide formique Phosphor durch Ameisensäure
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 17767:2022 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 . 4
8 Procedure. 5
8.1 Test portion . 5
8.2 Extraction . 5
Bibliography .
...
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