Fertilizers - Extraction of soluble phosphorus according to Petermann at 65 °C

This document specifies the procedure for the determination of soluble phosphorus in alkaline ammonium citrate.
The method is applicable exclusively to precipitated dehydrated dicalcium phosphate (CaHPO4 . 2H2O).

Düngemittel - Extraktion des löslichen Phosphors nach Petermann bei 65 °C

Das vorliegende Dokument legt ein Verfahren zur Bestimmung des in alkalischem Ammoniumcitrat löslichen Phosphors fest.
Das Verfahren ist ausschließlich auf Dicalciumphosphat-Dihydrat (CaHPO4  2H2O) anwendbar.

Engrais - Extraction du phosphore selon Petermann à 65 °C

Le présent document décrit le mode opératoire de dosage du phosphore soluble dans le citrate d’ammoniaque alcalin.
La présente méthode s’applique exclusivement au phosphate bicalcique précipité dihydrate (CaHPO4 . 2H2O).

Gnojila - Ekstrakcija topnega fosforja po Petermannu pri 65 °C

Ta dokument opredeljuje postopek določanja topnega fosforja v amonijevem citratu v alkalnem mediju. Metoda velja izključno za oborjeni kalcijev hidrogen fosfat dihidrat (CaHPO4 - 2H2O).

General Information

Status
Published
Public Enquiry End Date
31-Jan-2011
Publication Date
12-Sep-2011
ICS
65.080 - Fertilizers
Technical Committee
KAT - Soil quality
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
07-Sep-2011
Due Date
12-Nov-2011
Completion Date
13-Sep-2011
Directive
2003/2003 - Regulation (EC) N° 2003/2003 of the European Parlament and of the council of 13 October 2003 relating to fertilisers
Mandate
M/335 - Standardization Mandate assigned to the CEN concerning the modernisation of the methods of anylysis of Fertilizers
Ref Project
EN 15921:2011 - Fertilizers - Extraction of soluble phosphorus according to Petermann at 65 °C

Relations

Replaces
SIST-TS CEN/TS 15921:2010 - Fertilizers - Extraction of soluble phosphorus according to Petermann at 65 °C
Effective Date
01-Oct-2011

Overview

SIST EN 15921:2011 is a European standard developed by CEN that defines the standardized procedure for extracting soluble phosphorus from precipitated dehydrated dicalcium phosphate (CaHPO4 · 2H2O) fertilizers. The extraction method utilizes an alkaline ammonium citrate solution-commonly known as Petermann’s solution-at a controlled temperature of 65 °C. This standard ensures consistent, accurate, and reproducible determination of soluble phosphorus content in fertilizers, a crucial nutrient influencing fertilizer quality and agricultural productivity.

This standard applies exclusively to dicalcium phosphate and provides clear instructions for sample preparation, reagent composition, equipment, and the step-by-step extraction and filtration procedure.

Key Topics

  • Scope and Applicability: Extraction of soluble phosphorus is specifically for precipitated dehydrated dicalcium phosphate fertilizers, key in evaluating fertilizer phosphorus availability.
  • Petermann’s Solution: A carefully prepared alkaline ammonium citrate reagent with citric acid and ammoniacal nitrogen, maintaining a pH between 9.4 and 9.7 to optimize phosphorus solubility.
  • Controlled Extraction Conditions: The sample is extracted by shaking with Petermann’s solution at 65 °C for a total of 1.5 hours with intermittent agitation to ensure thorough dissolution.
  • Sample Preparation: Ground and homogenized fertilizer samples are used, complying with related standards such as EN 1482 for sampling and preparation.
  • Filtration and Analysis: After extraction, the solution is filtered to remove solids, with the filtrate subjected to phosphorus content determination following CEN/TS 15959.
  • Reagent Preparation and Validation: Detailed preparation methods for Petermann’s solution including adjustments of ammoniacal nitrogen content and pH, ensuring reagent consistency.
  • Laboratory Equipment: Specifies common glassware and a temperature-controlled water bath for maintaining the precise extraction temperature.

Applications

  • Fertilizer Quality Control: SIST EN 15921:2011 is essential for manufacturers and quality control laboratories to assess the soluble phosphorus fraction in dicalcium phosphate fertilizers, impacting nutrient efficiency and regulatory compliance.
  • Agricultural Fertilizer Certification: Enables authorities and certifiers to verify that fertilizers meet nutrient content claims, supporting adherence to European regulations.
  • Research and Development: Useful in fertilizer formulation studies focusing on phosphorus bioavailability and optimizing nutrient release.
  • Standardized Testing: Harmonizes analytical practices across Europe, providing uniformity for comparative analysis and international trade of phosphorus-containing fertilizers.
  • Environmental Monitoring: Helps evaluate the potential phosphorus runoff from fertilizers by quantifying soluble phosphorous fractions.

Related Standards

  • EN 1482-1 and EN 1482-2: Define sampling and sample preparation procedures for fertilizers, ensuring representative and homogeneous test samples.
  • EN 12944-1 and EN 12944-2: Provide standardized vocabulary related to fertilizers and soil improvers, ensuring clear terminology.
  • CEN/TS 15959: Specifies methods for the determination of extracted phosphorus from fertilizer samples.
  • EN 15475: Defines the determination of ammoniacal nitrogen content, used to verify the Petermann’s solution reagent.
  • EU Fertilizer Regulation (EC) No 2003/2003 Annex IV, method 3.1.5.1: Specifies the official European procedure for phosphorus extraction, related to this standard's methodology.

By implementing SIST EN 15921:2011, laboratories achieve reliable and consistent quantification of soluble phosphorus, thereby supporting fertilizer effectiveness, regulatory compliance, and sustainable agricultural practices. This standard is integral to enhancing phosphorus management within the fertilizer industry across Europe.

Frequently Asked Questions

SIST EN 15921:2011 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Fertilizers - Extraction of soluble phosphorus according to Petermann at 65 °C". This standard covers: This document specifies the procedure for the determination of soluble phosphorus in alkaline ammonium citrate. The method is applicable exclusively to precipitated dehydrated dicalcium phosphate (CaHPO4 . 2H2O).

This document specifies the procedure for the determination of soluble phosphorus in alkaline ammonium citrate. The method is applicable exclusively to precipitated dehydrated dicalcium phosphate (CaHPO4 . 2H2O).

SIST EN 15921:2011 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.

SIST EN 15921:2011 has the following relationships with other standards: It is inter standard links to SIST-TS CEN/TS 15921:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 15921:2011 is associated with the following European legislation: EU Directives/Regulations: 2003/2003; Standardization Mandates: M/335. 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.

SIST EN 15921:2011 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)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gnojila - Ekstrakcija topnega fosforja po Petermannu pri 65 °CDüngemittel - Extraktion des löslichen Phosphors nach Petermann bei 65 °CEngrais - Extraction du phosphore selon Petermann à 65 °CFertilizers - Extraction of soluble phosphorus according to Petermann at 65 °C65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 15921:2011SIST EN 15921:2011en,fr,de01-oktober-2011SIST EN 15921:2011SLOVENSKI
STANDARDSIST-TS CEN/TS 15921:20101DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15921
June 2011 ICS 65.080 Supersedes CEN/TS 15921:2009English Version
Fertilizers - Extraction of soluble phosphorus according to Petermann at 65 °C
Engrais - Extraction du phosphore soluble selon Petermann à 65 °C
Düngemittel - Extraktion des löslichen Phosphors nach Petermann bei 65 °C This European Standard was approved by CEN on 29 April 2011.
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. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15921:2011: ESIST EN 15921:2011
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