SIST EN 12441-9:2005

Zinc and zinc alloys - Chemical analysis - Part 9: Determination of nickel in zinc alloys - Flame atomic absorption spectrometric method

This document specifies a flame atomic absorption spectrometric method for the determination of nickel in zinc alloys. It is applicable to the products specified in EN 1774 and EN 12844.
It is suitable for the determination of nickel contents (mass fractions) between 0,000 5 % and 0,020 %.

Zink und Zinklegierungen - Chemische Analyse - Teil 9: Bestimmung von Nickel in Zinklegierungen - FAAS-Verfahren

Dieses Dokument legt ein flammenatomabsorptionsspektrometrisches Verfahren (FAAS-Verfahren) für die Bestimmung von Nickel in Zinklegierungen fest. Das Verfahren ist auf die in EN 1774 und EN 12844 festgelegten Produkte anwendbar.
Es ist geeignet für die Bestimmung von Nickelgehalten (Massenanteil) zwischen 0,000 5 % und 0,020 %.

Zinc et alliages de zinc - Analyse chimique - Partie 9 : Dosage du nickel dans les alliages de zinc - Méthode par spectrométrie d'absorption atomique dans la flamme

Ce document décrit une méthode d'analyse permettant de déterminer la teneur en nickel des alliages de zinc par spectrométrie d'absorption atomique dans la flamme. Elle est applicable aux produits spécifiés dans les EN 1774 et EN 12844.
Elle convient aux dosages de fractions massiques de nickel comprises entre 0,000 5 % et 0,020 %.

Cink in cinkove zlitine – Kemična analiza – 9. del: Določevanje niklja v cinkovih zlitinah – Metoda plamenske atomske absorpcijske spektrometrije

General Information

• Status: Published
• Publication Date: 28-Feb-2005
• 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-Mar-2005
• Due Date: 01-Mar-2005
• Completion Date: 01-Mar-2005
• Ref Project: EN 12441-9:2004 - Zinc and zinc alloys - Chemical analysis - Part 9: Determination of nickel in zinc alloys - Flame atomic absorption spectrometric method

Overview

EN 12441-9:2004 - published by CEN - specifies a flame atomic absorption spectrometric (FAAS) method for the chemical analysis of nickel in zinc alloys. It applies to zinc products covered by EN 1774 and EN 12844 and is suitable for nickel mass fractions from 0.0005 % to 0.020 %. The standard defines the analytical principle, required reagents and apparatus, sampling and test procedures, calibration, calculation of results and reporting requirements.

Key topics and technical requirements

• Analytical principle: Dissolve a representative sample in nitric acid, atomise in an air–acetylene flame and measure absorption at 232.0 nm by FAAS.
• Scope and range: Valid for nickel contents (mass fraction) between 0.0005 % and 0.020 % in zinc alloys.
• Reagents and standards: Uses high-purity reagents (nitric acid, hydrochloric acid, aqua regia) and prepared nickel standard solutions (e.g., 1.0 g/L stock and working standards). Pure zinc and aluminium nitrate are used in calibration matrix matching.
• Apparatus: FAAS instrument with premix burner (optical path 5–10 cm), air–acetylene oxidiser-fuel, and standard laboratory glassware cleaned with boiling aqua regia.
• Calibration: Seven-point calibration series corresponding to 0, 0.0005, 0.0010, 0.0020, 0.0050, 0.010 and 0.020 % Ni (mass fraction), prepared with matrix-matching (zinc and aluminium additions).
• Sampling and sample prep: Sampling per EN 12060; typical test portion 10 g dissolved and diluted to specified volume for measurement.
• Precision validation: Interlaboratory trials (10 laboratories) demonstrate concentration-dependent precision. Example repeatability and reproducibility at selected levels:
  • 0.0005 % Ni: repeatability r ≈ 0.00004 %, reproducibility R ≈ 0.00018 %
  • 0.020 % Ni: repeatability r ≈ 0.00050 %, reproducibility R ≈ 0.00184 %.
• Reporting: Results expressed as percentage by mass, with individual and mean values, method reference, test conditions and laboratory identification.

Applications

• Quality control and acceptance testing of zinc ingots, castings and foundry alloys specified in EN 1774 and EN 12844.
• Compliance testing during alloy production, recycling and incoming material inspection where trace nickel must be controlled.
• Use in testing laboratories performing elemental certification and in metallurgical R&D where precise low-level Ni determination in zinc matrices is required.

Who should use this standard

• Accredited testing laboratories and chemical analysts using FAAS.
• Zinc alloy producers, foundries and metal recyclers maintaining alloy composition control.
• Standards bodies, contract laboratories and quality engineers specifying or verifying compliance with EN alloy specifications.

Related standards

• EN 12441 series (Parts 1–11) - other chemical analysis methods for Al, Mg, Fe, Sn, Cu, Cr, Ti, Si, etc.
• EN 1774, EN 12844 (product specifications) and EN 12060 (sampling).
• ISO 5725 series (accuracy, repeatability and reproducibility).

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Zink und Zinklegierungen - Chemische Analyse - Teil 9: Bestimmung von Nickel in Zinklegierungen - FAAS-VerfahrenZinc et alliages de zinc - Analyse chimique - Partie 9 : Dosage du nickel dans les alliages de zinc - Méthode par spectrométrie d'absorption atomique dans la flammeZinc and zinc alloys - Chemical analysis - Part 9: Determination of nickel 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 12441-9:2004SIST EN 12441-9:2005en01-marec-2005SIST EN 12441-9:2005SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12441-9December 2004ICS 77.040.30; 77.120.60English versionZinc and zinc alloys - Chemical analysis - Part 9: Determinationof nickel in zinc alloys - Flame atomic absorption spectrometricmethodZinc et alliages de zinc - Analyse chimique - Partie 9 :Dosage du nickel dans les alliages de zinc - Méthode parspectrométrie d'absorption atomique dans la flammeZink und Zinklegierungen - Chemische Analyse - Teil 9:Bestimmung von Nickel in Zinklegierungen - FAAS-VerfahrenThis European Standard was approved by CEN on 4 November 2004.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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12441-9:2004: ESIST EN 12441-9:2005

Additional information on international co-operative tests.9 Annex B (informative)
Graphical representation of precision data.10 Bibliography.11
Scope This document specifies a flame atomic absorption spectrometric method for the determination of nickel in zinc alloys. It is applicable to the products specified in EN 1774 and EN 12844. It is suitable for the determination of nickel contents (mass fractions) between 0,000 5 % and 0,020 %. 2
Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1774, Zinc and zinc alloys – Alloys for foundry purposes – Ingot and liquid EN 12060:1997, Zinc and zinc alloys – Method of sampling – Specifications EN 12844, Zinc and zinc alloys – Castings – Specifications 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12060:1997 and the following term and definition apply. 3.1 atomic absorption spectrometry measurement of the absorption of an electromagnetic radiation, emitted by an element at a determined wavelength, by an absorbent medium (flame) formed by atoms of the same element that are in the ground state. Each element absorbs radiation of specific wavelengths and the intensity of the absorbed radiation is proportional to the concentration of said element 4 Principle A sample of the alloy is dissolved in a nitric acid and, after adequate dissolution and atomisation of the solution in an air-acetylene flame, the content of nickel is determined by atomic absorption spectrometry at the wavelength of 232,0 nm. 5 Reagents 5.1 General During the test, use only reagents of known or analytical grade and distilled or demineralised water. 5.2 Nitric acid, ρ = 1,4 g/ml SIST EN 12441-9:2005
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