EN 16198:2012
(Main)Fertilizers - Determination of magnesium by complexometry
Fertilizers - Determination of magnesium by complexometry
This European Standard specifies a method for the determination of magnesium in fertilizer extracts by complexometry.
The method is applicable to the following EC fertilizer extracts for which the determination of total magnesium and/or water-soluble magnesium is provided for according to the Regulation (EC) No 2003/2003, Annex I [3]:
- fertilizers listed in [3], Annex I: straight nitrogenous fertilizers, type 1b + 1c (calcium magnesium nitrate), type 7 (magnesium sulfonitrate), type 8 (nitrogenous fertilizers with magnesium) and straight potassic fertilizers, type 2 (enriched kainite), type 4 (potassium chloride containing magnesium), type 6 (potassium sulfate containing magnesium salt);
- fertilizers listed in [3], Annex I D relating to secondary nutrients.
Düngemittel - Komplexometrische Bestimmung von Magnesium
Diese Europäische Norm legt ein Verfahren zur Bestimmung von Magnesium in Düngemittelextrakten fest.
Das Verfahren gilt für die folgenden EG-Düngemittelextrakte, für die die Angabe des Gesamtmagnesiums und/oder des wasserlöslichen Magnesiums entsprechend der Verordnung (EG) Nr. 2003/2003, Anhang I, [3], vorgeschrieben ist:
in [3], Anhang I, aufgeführte Düngemittel: Einnährstoff-Stickstoffdünger vom Typ 1b 1c (Calcium-Magnesiumnitrat), Typ 7 (Stickstoff-Magnesiumsulfat), Typ 8 (Stickstoffdünger mit Magnesium) und Einnährstoff-Kalidünger vom Typ 2 (angereichertes Kainit), Typ 4 (Kaliumchlorid mit Magnesium), Typ 6 (Kaliumsulfat mit Magnesium);
in [3], Anhang I D, aufgeführte Düngemittel mit Bezug auf Sekundärnährstoffe.
Engrais - Dosage du magnésium par complexométrie
La présente norme européenne spécifie une méthode de dosage du magnésium, par complexométrie, dans les extraits d’échantillons d’engrais.
Cette méthode est applicable aux extraits d’échantillons d’engrais CE pour lesquels le dosage du magnésium total et/ou soluble eau est prévu, conformément au Règlement (CE) n° 2003/2003, Annexe I de la référence bibliographique [3] :
engrais répertoriés dans l’Annexe I de la référence bibliographique [3] ; engrais azotés simples, type 1b + 1c (nitrate de calcium et de magnésium), type 7 (sulfonitrate de magnésium), type 8 (engrais azotés contenant du magnésium) et engrais potassiques simples, type 2 (kaïnite enrichie), type 4 (chlorure de potassium contenant du magnésium), type 6 (sulfate de potassium contenant du sel de magnésium) ;
engrais répertoriés dans l’Annexe I D de la référence bibliographique [3] relative aux éléments nutritifs secondaires.
Gnojila - Kompleksometrijsko določevanje magnezija
Ta evropski standard določa metodo za določevanje magnezija v ekstraktih gnojil s kompleksometrijo. Metoda se uporablja za naslednje ekstrakte gnojil ES, za katere je predvideno določanje količine skupnega magnezija in/ali v vodi topnega magnezija v skladu s Prilogo I k Uredbi (ES) št. 2003/2003: – gnojila, uvrščena na seznam v Prilogi I: enostavna dušična gnojila vrste 1b + 1c (kalcij-magnezijev nitrat), vrste 7 (magnezijev sulfonitrat), vrste 8 (dušična gnojila z magnezijem) in enostavna kalijeva gnojila vrste 2 (obogateni kajnit), vrste 4 (kalijev klorid, ki vsebuje magnezij), vrste 6 (kalijev sulfat, ki vsebuje magnezijevo sol); – gnojila, uvrščena na seznam v Prilogi I D v zvezi s sekundarnimi hranili.
General Information
- Status
- Published
- Publication Date
- 13-Nov-2012
- Withdrawal Date
- 30-May-2013
- Technical Committee
- CEN/TC 260 - Fertilizers and liming materials
- Drafting Committee
- CEN/TC 260/WG 7 - Chemical analysis
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 04-Jun-2024
- Completion Date
- 14-Apr-2025
Relations
- Effective Date
- 08-Jun-2022
Overview
EN 16198:2012 – Fertilizers: Determination of magnesium by complexometry specifies a standardized laboratory method to determine magnesium content in fertilizer extracts using complexometric titration. The method is intended for EC fertilizer extracts where total and/or water‑soluble magnesium is required under Regulation (EC) No 2003/2003, Annex I. It covers a range of fertilizer types (e.g., calcium magnesium nitrate, magnesium sulfonitrate, nitrogenous and potassic fertilizers containing magnesium) and secondary nutrient materials.
Key topics and technical requirements
- Principle: Two-step EDTA titration - first titration of Ca + Mg using Eriochrome black‑T, second titration of Ca using calcein or calcon carbonic acid; magnesium is determined by difference.
- Extraction: Magnesium is solubilised following EN 15960 (total) or EN 15961 (water‑soluble) extraction procedures prior to titration.
- Reagents & solutions: Standard solutions (Mg and Ca, typically 0.05 mol·L‑1), EDTA 0.05 mol·L‑1, buffer (pH 10.5), indicators (Eriochrome black‑T, calcein, calcon carbonic acid), and KCN/KOH reagents for masking interferences are specified.
- Apparatus & conditions: pH control (10.5 ± 0.1), magnetic/mechanical stirrer, pH meter and standard laboratory glassware are required. Aliquot sizes are chosen to deliver ~9–18 mg Mg in the titration.
- Quality control: Control titrations with matched Ca/Mg ratios and checks of EDTA and standard solution equivalence are required. Precision data (repeatability and reproducibility) are provided from inter‑laboratory studies.
- Safety and disposal: Use of cyanide solutions is included; laboratories must follow safe handling and detoxification (oxidation after alkalisation) before disposal.
Applications and who uses this standard
- Fertilizer manufacturers for product formulation, quality control and compliance with EC labeling and composition rules.
- Analytical and testing laboratories that perform routine nutrient assays on fertilizer materials (total and water‑soluble Mg).
- Regulatory authorities and inspectors verifying compliance with Regulation (EC) No 2003/2003 and Annex I nutrient declarations.
- Agronomists and product R&D teams assessing magnesium supply and product performance. Practical outcomes include accurate Mg/MgO mass fraction reporting, comparative assessments across production batches, and harmonized inter‑laboratory results using the standardized complexometric EDTA method.
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 / EN 12944-2 - Vocabulary for fertilizers and liming materials
- Regulation (EC) No 2003/2003, Annex I - Fertilizer classification and nutrient reporting
Keywords: EN 16198:2012, fertilizers magnesium determination, complexometry, EDTA titration, magnesium in fertilizers, fertilizer testing, Eriochrome black‑T.
Frequently Asked Questions
EN 16198:2012 is a standard published by the European Committee for Standardization (CEN). Its full title is "Fertilizers - Determination of magnesium by complexometry". This standard covers: This European Standard specifies a method for the determination of magnesium in fertilizer extracts by complexometry. The method is applicable to the following EC fertilizer extracts for which the determination of total magnesium and/or water-soluble magnesium is provided for according to the Regulation (EC) No 2003/2003, Annex I [3]: - fertilizers listed in [3], Annex I: straight nitrogenous fertilizers, type 1b + 1c (calcium magnesium nitrate), type 7 (magnesium sulfonitrate), type 8 (nitrogenous fertilizers with magnesium) and straight potassic fertilizers, type 2 (enriched kainite), type 4 (potassium chloride containing magnesium), type 6 (potassium sulfate containing magnesium salt); - fertilizers listed in [3], Annex I D relating to secondary nutrients.
This European Standard specifies a method for the determination of magnesium in fertilizer extracts by complexometry. The method is applicable to the following EC fertilizer extracts for which the determination of total magnesium and/or water-soluble magnesium is provided for according to the Regulation (EC) No 2003/2003, Annex I [3]: - fertilizers listed in [3], Annex I: straight nitrogenous fertilizers, type 1b + 1c (calcium magnesium nitrate), type 7 (magnesium sulfonitrate), type 8 (nitrogenous fertilizers with magnesium) and straight potassic fertilizers, type 2 (enriched kainite), type 4 (potassium chloride containing magnesium), type 6 (potassium sulfate containing magnesium salt); - fertilizers listed in [3], Annex I D relating to secondary nutrients.
EN 16198:2012 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.
EN 16198:2012 has the following relationships with other standards: It is inter standard links to CEN/TS 16198:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 16198:2012 is associated with the following European legislation: EU Directives/Regulations: 2003/2003, 2019/1009; 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.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Düngemittel - Komplexometrische Bestimmung von MagnesiumEngrais - Dosage du magnésium par complexométrieFertilizers - Determination of magnesium by complexometry65.080GnojilaFertilizersICS:Ta slovenski standard je istoveten z:EN 16198:2012SIST EN 16198:2013en,fr,de01-maj-2013SIST EN 16198:2013SLOVENSKI
STANDARDSIST-TS CEN/TS 16198:20111DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16198
November 2012 ICS 65.080 Supersedes CEN/TS 16198:2011English Version
Fertilizers - Determination of magnesium by complexometry
Engrais - Dosage du magnésium par complexométrie
Düngemittel - Komplexometrische Bestimmung von Magnesium 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
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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 16198:2012: ESIST EN 16198:2013
Statistical results of the inter-laboratory test . 10Bibliography . 12 SIST EN 16198:2013
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