PD CEN TS 17767-2022 PDF

Full title and description

STB PD CEN TS 17767-2022 — "Organo-mineral fertilizers — Extraction of phosphorus by formic acid". This Technical Specification defines a laboratory extraction method using 2 % formic acid to determine the fraction of phosphorus associated with soft natural phosphates in organo‑mineral fertiliser products.

Abstract

This document specifies the procedure for extracting phosphorus from organo‑mineral fertilisers using 2 % (20 g/L) formic acid. It covers reagent preparation, sample size and preparation, apparatus, extraction and shaking conditions, filtration, calculation of results and applicability limits. The method is intended to represent the amount of phosphorus soluble in weak (soft) natural phosphates and to support consistent testing and classification of organo‑mineral fertilisers.

General information

• Status: Published (CEN Technical Specification, adopted for national use in several member bodies).
• Publication date: 2022 (CEN/TS issued April–May 2022; national adoptions published in the following months—see national bodies for exact adoption dates).
• Publisher: CEN (European Committee for Standardization); multiple national standards bodies have published national versions (examples: DIN, UNE, STN, LST).
• ICS / categories: 65.080 — Fertilisers.
• Edition / version: CEN/TS 17767:2022 (Technical Specification, first edition).
• Number of pages: 6–8 pages (most national publications and listings report 8 pages).

Scope

The specification applies to organo‑mineral fertilisers and describes an extraction intended to represent phosphorus associated with soft natural phosphates by using 2 % formic acid (20 g/L). The method is designed for routine laboratory use to obtain a reproducible extract for further phosphorus determination and classification. It is not a full normative reference for final phosphorus reporting methods (those follow after extraction) and is intended to be used where the distinction of soft vs. hard phosphate fractions is required.

Key topics and requirements

• Reagent specification: preparation and concentration of 2 % formic acid (20 g/L) and use of demineralized/distilled water.
• Test portion and apparatus: typical test portion (e.g., 5 g ± 0.001 g) and required glassware, graduated flasks, rotary shaker and appropriate filters.
• Extraction conditions: temperature control (around 20 °C), shaking time (commonly 30 minutes) and handling to ensure reproducible extraction of the soft‑phosphate fraction.
• Filtration and sample handling: use of phosphate‑free filters and procedures to avoid contamination.
• Calculation and expression of results: conversion of extract concentration to phosphorus content in the original test portion and reporting conventions.
• Applicability and limitations: applies to organo‑mineral fertilisers and is intended to mimic the solubility behaviour of soft natural phosphates; not intended for all phosphate forms or for replacing full specification methods where other extraction regimes are required.

Typical use and users

Analytical and quality control laboratories in the fertiliser industry, manufacturers of organo‑mineral fertilisers, conformity assessment bodies, regulatory authorities and standardisation committees use this Technical Specification to characterise the form of phosphorus present and to support product classification, labelling and compliance testing. The method is used where a simple, reproducible extraction representative of soft natural phosphates is required.

Related standards

Related documents include other CEN/TC 260 outputs on fertilisers and methods for nutrient determination and classification. National adoptions (DIN, UNE, STN, LST, etc.) provide language versions. This TS complements broader product and analytical standards used for fertiliser conformity with EU Regulation 2019/1009 and other CEN methods for nutrient analysis. See CEN/TC 260 work items and adjacent CEN/TS documents for linked methods and claims standards.

Keywords

organo‑mineral fertilisers, phosphorus extraction, formic acid extraction, soft natural phosphates, laboratory method, CEN/TS 17767:2022.

FAQ

Q: What is this standard?

A: It is a CEN Technical Specification (CEN/TS 17767:2022) that specifies a laboratory extraction procedure using 2 % formic acid to extract the phosphorus fraction representing soft natural phosphates from organo‑mineral fertilisers.

Q: What does it cover?

A: The TS covers reagent preparation (2 % formic acid), sample size and preparation, apparatus and equipment, extraction and shaking conditions, filtration, calculation of results and the method's applicability and limitations for organo‑mineral fertilisers. It does not replace subsequent analytical determination methods for phosphorus after extraction.

Q: Who typically uses it?

A: Quality control and analytical laboratories in the fertiliser industry, product manufacturers, conformity assessment and regulatory bodies, and standards committees concerned with fertiliser testing and classification.

Q: Is it current or superseded?

A: As published in 2022, CEN/TS 17767:2022 is the current Technical Specification. National adoptions followed in 2022. Like all CEN documents, it may be subject to review or future revision; users should check national standards bodies or CEN for the latest status before relying on it for compliance decisions.

Q: Is it part of a series?

A: It was developed under CEN/TC 260 (Fertilisers and liming materials) and complements other CEN documents addressing fertiliser claims, nutrient determinations and product categories. Some adjacent CEN technical specifications and prEN work items address related topics (e.g., claims for biostimulants and other fertiliser testing methods).

Q: What are the key keywords?

A: Organo‑mineral fertilisers; phosphorus; formic acid extraction; soft natural phosphates; CEN/TS 17767:2022.