Fertilizers - Manganimetric determination of extracted calcium following precipitation in the form of oxalate

This European Standard specifies a manganimetric method for the determination of the calcium content in fertilizer extracts.
This method is applicable to EC fertilizers for which a declaration of the total and/or water-soluble calcium content is provided for in Regulation (EC) No 2003/2003, Annex I [3].

Düngemittel - Manganometrische Bestimmung von Calcium nach Oxalatfällung

Diese Europäische Norm legt ein Verfahren zur Bestimmung des Calciumgehalts in Dünge¬mittel¬extrakten fest.
Dieses Verfahren gilt für EG-Düngemittel, für die die Verordnung (EG) Nr. 2003/2003, Anhang I [3] die Angabe des gesamten und/oder des wasserlöslichen Calciumgehalts vorschreibt.

Engrais - Dosage manganimétrique du calcium extrait après précipitation sous forme d'oxalate

La présente norme européenne spécifie une méthode de dosage manganimétrique du calcium dans des solutions d’extraction d’engrais.
Cette méthode est applicable aux engrais CE pour lesquels une déclaration de la teneur en calcium total et/ou soluble dans l’eau est prévue dans le Règlement (CE) n° 2003/2003, Annexe I [3].

Gnojila - Manganometrijsko določevanje ekstrahiranega kalcija po obarjanju v obliki oksalata

Ta evropski standard določa manganometrijsko metodo za določevanje vsebnosti kalcija v ekstraktih gnojil. Ta metoda se uporablja za gnojila ES, za katera je v Prilogi I k Uredbi (ES) št. 2003/2003 navedena skupna vsebnost kalcija in/ali vsebnost v vodi topnega kalcija.

General Information

Status
Published
Public Enquiry End Date
31-Jul-2012
Publication Date
21-Apr-2013
ICS
65.080 - Fertilizers
Technical Committee
KAT - Soil quality
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
04-Apr-2013
Due Date
09-Jun-2013
Completion Date
22-Apr-2013
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 16196:2012 - Fertilizers - Manganimetric determination of extracted calcium following precipitation in the form of oxalate

Relations

Replaces
SIST-TS CEN/TS 16196:2011 - Fertilizers - Manganimetric determination of extracted calcium following precipitation in the form of oxalate
Effective Date
01-May-2013

Overview

EN 16196:2012 (CEN) specifies a manganimetric method for the determination of calcium content in fertilizer extracts after precipitation as calcium oxalate. The standard applies to EC fertilizers requiring declaration of total and/or water‑soluble calcium under Regulation (EC) No 2003/2003, Annex I. The method is a classical potassium permanganate titration of the oxalate precipitate and reports results as percent Ca (with an optional conversion to CaO using factor 1.4).

Key topics and requirements

  • Scope: Analytical determination of calcium in extraction solutions prepared according to EN 15960 (total Ca extraction) or EN 15961 (water‑soluble Ca extraction).
  • Principle: Precipitate calcium as calcium oxalate, filter, dissolve the precipitate in sulfuric acid and titrate the resulting oxalate with standard potassium permanganate (manganimetric determination).
  • Reagents & indicators: potassium permanganate standard solution (c = 0.02 mol/L), ammonium oxalate (saturated), diluted HCl, diluted H2SO4, ammonia solution, citric acid, ammonium chloride, bromothymol blue and bromocresol green indicators.
  • Apparatus: sintered glass filter crucible (5–20 µm), hot water bath, 400 mL beaker and standard volumetric equipment.
  • Test portion & procedure: Aliquot of extraction solution containing ~15–50 mg Ca, oxalate precipitation at controlled pH (4.4–4.6), heating, filtration, and titration at 70–80 °C until persistent pink end‑point.
  • Calculation: Result computed from titrant volume, aliquot and extraction volumes, permanganate concentration; Ca expressed in % and convertible to CaO.
  • Precision: Repeatability and reproducibility established via inter‑laboratory tests (see Annex A) and evaluated per ISO 5725‑2. Standard includes guidance on reporting repeatability/reproducibility results.
  • Test report: Must include sample ID, extraction method (EN 15960 or EN 15961), method reference (EN 16196), results, dates, deviations and any operational details.

Applications and users

  • Who uses it: fertilizer manufacturers, independent testing laboratories, regulatory compliance bodies, quality control (QC) teams and agronomic laboratories.
  • Practical uses:
    • Verify manufacturer declarations of total or water‑soluble calcium for compliance with Regulation (EC) No 2003/2003.
    • Routine QC of fertilizer batches and incoming raw materials.
    • Comparative analyses in inter‑laboratory studies and method validation.

Related standards

  • EN 15960 - Extraction of total Ca, Mg, Na and S (sulfates)
  • EN 15961 - Extraction of water‑soluble Ca, Mg, Na and S (sulfates)
  • EN 1482-2 - Sample preparation for fertilizers
  • EN 12944-1 / -2 - Vocabulary for fertilizers
  • ISO 5725-2 - Precision (repeatability and reproducibility) of measurement methods

Keywords: EN 16196:2012, manganimetric determination, calcium in fertilizers, oxalate precipitation, potassium permanganate titration, EN 15960, EN 15961, Regulation (EC) No 2003/2003, precision, repeatability, reproducibility.

Frequently Asked Questions

SIST EN 16196:2013 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Fertilizers - Manganimetric determination of extracted calcium following precipitation in the form of oxalate". This standard covers: This European Standard specifies a manganimetric method for the determination of the calcium content in fertilizer extracts. This method is applicable to EC fertilizers for which a declaration of the total and/or water-soluble calcium content is provided for in Regulation (EC) No 2003/2003, Annex I [3].

This European Standard specifies a manganimetric method for the determination of the calcium content in fertilizer extracts. This method is applicable to EC fertilizers for which a declaration of the total and/or water-soluble calcium content is provided for in Regulation (EC) No 2003/2003, Annex I [3].

SIST EN 16196:2013 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 16196:2013 has the following relationships with other standards: It is inter standard links to SIST-TS CEN/TS 16196:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 16196:2013 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 16196:2013 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.Düngemittel - Manganometrische Bestimmung von Calcium nach OxalatfällungEngrais - Dosage manganimétrique du calcium extrait après précipitation sous forme d'oxalateFertilizers - Manganimetric determination of extracted calcium following precipitation in the form of oxalate65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 16196:2012SIST EN 16196:2013en,fr,de01-maj-2013SIST EN 16196:2013SLOVENSKI
STANDARDSIST-TS CEN/TS 16196:20111DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16196
November 2012 ICS 65.080 Supersedes CEN/TS 16196:2011English Version
Fertilizers - Manganimetric determination of extracted calcium following precipitation in the form of oxalate
Engrais - Dosage manganimétrique du calcium extrait après précipitation sous forme d'oxalate
Düngemittel - Manganometrische Bestimmung von Calcium nach Oxalatfällung This European Standard was approved by CEN on 6 October 2012.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16196:2012: ESIST EN 16196:2013

Statistical results of the inter-laboratory tests .8Bibliography . 10 SIST EN 16196:2013
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