SIST EN 12441-2:2004

Zinc and zinc alloys - Chemical analysis - Part 2: Determination of magnesium in zinc alloys - Flame atomic absorption spectrometric method

This European Standard specifies a flame atomic absorption spectrometric method for the determination of magnesium in zinc alloys. It is applicable to the products specified in EN 1774 and EN 12844.
It is suitable for the determination of magnesium contents (mass fractions) between 0,002 % and 0,08 %.

Zink und Zinklegierungen - Chemische Analyse - Teil 2: Bestimmung von Magnesium in Zinklegierungen - FAAS-Verfahren

Diese Europäische Norm legt ein flammenatomabsorptionsspektrometrisches Verfahren (FAAS-Verfahren) für die Bestimmung von Magnesium in Zinklegierungen fest. Das Verfahren ist auf die in EN 1774 und EN 12844 festgelegten Produkte anwendbar.
Es ist geeignet für die Bestimmung von Magnesiumgehalten (Massenanteile) zwischen 0,002 % und 0,08 %.

Zinc et alliages de zinc - Analyse chimique - Partie 2: Dosage du magnésium dans les alliages de zinc - Méthode par spectrométrie d'absorption atomique dans la flamme

La présente Norme européenne spécifie une méthode par spectrométrie d'absorption atomique dans la flamme pour le dosage du magnésium dans les alliages de zinc. La méthode s'applique aux produits spécifiés dans l'EN 1774 et l'EN 12844.
Elle convient pour la détermination des teneurs (fractions massiques) du magnésium comprises entre 0,002 % et 0,08 %.

Cink in cinkove zlitine – Kemična analiza – 2. del: Določevanje magnezija v cinkovih zlitinah – Metoda plamenske atomske absorpcijske spektrometrije

General Information

• Status: Published
• Publication Date: 31-Dec-2003
• ICS: 77.040.30 - Chemical analysis of metals
• ICS: 77.120.60 - Lead, zinc, tin and their alloys
• Technical Committee: INEK - Nonferrous metals
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2004
• Due Date: 01-Jan-2004
• Completion Date: 01-Jan-2004
• Ref Project: EN 12441-2:2001 - Zinc and zinc alloys - Chemical analysis - Part 2: Determination of magnesium in zinc alloys - Flame atomic absorption spectrometric method

Relations

• Amended By: SIST EN 12441-2:2004/A2:2005 - Zinc and zinc alloys - Chemical analysis - Part 2: Determination of magnesium in zinc alloys - Flame atomic absorption spectrometric method
• Effective Date: 22-Dec-2008
• Amended By: SIST EN 12441-2:2004/A1:2004 - Zinc and zinc alloys - Chemical analysis - Part 2: Determination of magnesium in zinc alloys - Flame atomic absorption spectrometric method
• Effective Date: 22-Dec-2008
• Parent: SIST EN 12441-1:2004 - Zinc and zinc alloys - Chemical analysis - Part 1: Determination of aluminium in zinc alloys - Titrimetric method
• Effective Date: 22-Dec-2008

Overview

SIST EN 12441-2:2004 is a European Standard developed by CEN that specifies a precise flame atomic absorption spectrometric method for determining magnesium content in zinc alloys. It applies to zinc alloy products defined under EN 1774 and EN 12844 standards. This method is suitable for measuring magnesium mass fractions ranging from 0.002% to 0.08%, providing a reliable chemical analysis essential in foundry and metallurgical industries.

This standard is part of a broader series focused on chemical analysis of zinc and its alloys, ensuring consistent quality and compliance in alloy composition.

Key Topics

• Scope and Application: Suitable for zinc alloys used in foundry and casting as specified in EN 1774 and EN 12844.
• Principle: The alloy sample is dissolved in hydrochloric and nitric acid mixture. Magnesium content is analyzed by flame atomic absorption spectrometry at a wavelength of 285.21 nm using an air-acetylene or nitrous oxide-acetylene flame.
• Test Range: Magnesium contents between 0.002% and 0.08% mass fraction.
• Reagents: Includes preparations of acid mixtures, lanthanum solutions, and standard magnesium, zinc, and aluminium solutions with high purity to ensure accuracy.
• Apparatus: Utilizes an atomic absorption spectrometer with a premix burner, adhering to strict setup parameters to ensure repeatability and reproducibility.
• Calibration & Measurement: The method involves preparing calibration solutions with known magnesium concentrations, using a lanthanum solution as a releasing agent, and measuring absorbance reliably.
• Precision & Accuracy: Repeatability and reproducibility limits are detailed to ensure confidence in results. The standard includes data derived from extensive international round-robin tests with multiple laboratories.
• Reporting: Test reports must clearly state sample identification, test method reference, measured magnesium content, deviations, testing conditions, and responsible personnel signatures.

Applications

• Metallurgical Quality Control: Ensuring consistent magnesium content in zinc alloys to maintain mechanical properties and corrosion resistance.
• Foundry Industry: Verification of magnesium levels in alloys used for castings, supporting alloy specifications compliance.
• Material Certification: Providing accredited testing for manufacturers and suppliers in the zinc alloy supply chain.
• Research and Development: Assisting in alloy formulation adjustments through precise magnesium quantification.
• Regulatory Compliance: Meeting European standards and international testing norms for zinc and zinc alloy production.

Related Standards

• EN 1774 – Zinc and zinc alloys: Alloys for foundry purposes – Ingot and liquid.
• EN 12844 – Zinc and zinc alloys: Castings – Specifications.
• EN 12060 – Zinc and zinc alloys: Methods of sampling.
• Other parts of EN 12441 series covering:
  • Aluminum determination (Part 1)
  • Lead, cadmium, and copper analysis (Part 3)
  • Iron determination (Parts 4 and 5)
  • Aluminium and iron by FAAS (Part 6)
  • Tin determination (Parts 7 and 8)
  • Nickel determination (Part 9)
  • Chromium and titanium analysis (Part 10)
  • Silicon determination (Part 11)

Practical Benefits

• Enhanced Measurement Precision: Utilizes atomic absorption spectrometry, offering sensitive and specific magnesium quantification in complex zinc matrixes.
• Standardized Procedure: Facilitates reproducibility of results across laboratories and countries, supporting trade and quality assurance.
• Comprehensive Documentation: Encourages thorough reporting and quality control via a detailed procedural framework.
• Supporting Industrial Consistency: By defining clear analytical methods, the standard helps avoid material inconsistencies affecting casting and performance.

By following SIST EN 12441-2:2004, laboratories and manufacturers benefit from a validated, internationally recognized method for magnesium determination in zinc alloys-crucial for maintaining alloy integrity and meeting regulatory requirements.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.PHWULMHZink und Zinklegierungen - Chemische Analyse - Teil 2: Bestimmung von Magnesium in Zinklegierungen - FAAS-VerfahrenZinc et alliages de zinc - Analyse chimique - Partie 2: Dosage du magnésium dans les alliages de zinc - Méthode par spectrométrie d'absorption atomique dans la flammeZinc and zinc alloys - Chemical analysis - Part 2: Determination of magnesium in zinc alloys - Flame atomic absorption spectrometric method77.120.60Svinec, cink, kositer in njihove zlitineLead, zinc, tin and their alloys77.040.30Kemijska analiza kovinChemical analysis of metalsICS:Ta slovenski standard je istoveten z:EN 12441-2:2001SIST EN 12441-2:2004en01-januar-2004SIST EN 12441-2:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12441-2October 2001ICS 77.040.30; 77.120.60English versionZinc and zinc alloys - Chemical analysis - Part 2: Determinationof magnesium in zinc alloys - Flame atomic absorptionspectrometric methodZinc et alliages de zinc - Analyse chimique - Partie 2:Dosage du magnésium dans les alliages de zinc - Méthodepar spectrométrie d'absorption atomique dans la flammeZink und Zinklegierungen - Chemische Analyse - Teil 2:Bestimmung von Magnesium in Zinklegierungen - FAAS-VerfahrenThis European Standard was approved by CEN on 11 August 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12441-2:2001 ESIST EN 12441-2:2004

Additional information on international round - Robin tests.9Annex B (informative)
Graphical representation of precision data.10SIST EN 12441-2:2004

= 1,19 g/ml5.3 Nitric acid,
= 1,4 g/ml5.4 Hydrochloric acid - nitric acid mixtureMix 180 volumes of hydrochloric acid (5.2) with 4 volumes of nitric acid (5.3). This mixture shall be freshly preparedjust before use.5.5 Lanthanum, 5 % solutionIntroduce 29,5 g of lanthanum oxide (La2O3) in a 400 ml beaker. Add 5 ml of water, then carefully add 50 ml ofhydrochloric acid (5.2). After dissolution, cool to room temperature. Transfer quantitatively to a 500 ml volumetricflask. Dilute to the mark with water and mix.5.6 Zinc, 10 g/l solutionDissolve 10 g of zinc (99,99 %), free from magnesium, (see 5.11), with 60
...