SIST EN 12441-8:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.PHWULMHZink und Zinklegierungen - Chemische Analyse - Teil 8: Bestimmung von Zinn in Sekundärzink - FAAS-VerfahrenZinc et alliages de zinc - Analyse chimique - Partie 8: Dosage de l'étain dans le zinc - Méthode par spectrométrie d'absorption atomique dans la flammeZinc and zinc alloys - Chemical analysis - Part 8: Determination of tin in secondary zinc - 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 12441-8:2004SIST EN 12441-8:2005en01-marec-2005SIST EN 12441-8:2005SLOVENSKI
STANDARD



SIST EN 12441-8:2005



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12441-8December 2004ICS 77.040.30; 77.120.60English versionZinc and zinc alloys - Chemical analysis - Part 8: Determinationof tin in secondary zinc - Flame atomic absorption spectrometricmethodZinc et alliages de zinc - Analyse chimique - Partie 8:Dosage de l'étain dans le zinc - Méthode par spectrométried'absorption atomique dans la flammeZink und Zinklegierungen - Chemische Analyse - Teil 8:Bestimmung von Zinn in Sekundärzink - 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 12441-8:2004: ESIST EN 12441-8:2005



EN 12441-8:2004 (E) 2 Contents Page Foreword.3 1 Scope.4 2 Normative references.4 3 Terms and definitions.4 4 Principle.4 5 Reagents.4 6 Apparatus.5 7 Sampling.5 8 Procedure.5 9 Calculation and expression of results.6 10 Test report.7 Annex A (informative)
Additional information on international co-operative tests.8 Annex B (informative)
Graphical representation of precision data.9 Bibliography.10
SIST EN 12441-8:2005



EN 12441-8:2004 (E) 3 Foreword This document (EN 12441-8:2004) has been prepared by Technical Committee CEN/TC 209 “Zinc and zinc alloys”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. Within its programme of work, Technical Committee CEN/TC 209 entrusted CEN/TC 209/WG 6 "Methods of analysis and testing" to prepare the following document: EN 12441-8, Zinc and zinc alloys – Chemical analysis – Part 8: Determination of tin in secondary zinc – Flame atomic absorption spectrometric method This document is a part of a series of eleven standards. The other documents are:  Part 1: Determination of aluminium in zinc alloys – Titrimetric method  Part 2: Determination of magnesium in zinc alloys – Flame atomic absorption spectrometric method  Part 3: Determination of lead, cadmium and copper – Flame atomic absorption spectrometric method  Part 4: Determination of iron in zinc alloys – Spectrophotometric method  Part 5: Determination of iron in primary zinc – Spectrophotometric method  Part 6: Determination of aluminium and iron – Flame atomic absorption spectrometric method  Part 7: Determination of tin – Flame atomic absorption spectrometric method after extraction  Part 9: Determination of nickel in zinc alloys – Flame atomic absorption spectrometric method  Part 10: Determination of chromium and titanium in zinc alloys – Spectrophotometric method  Part 11: Determination of silicon in zinc alloys – Spectrophotometric method According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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.
SIST EN 12441-8:2005



EN 12441-8:2004 (E) 4 1 Scope This document specifies a flame atomic absorption spectrometric method for the determination of tin in secondary zinc. It is applicable to the products specified in EN 13283. It is suitable for the determination of tin contents (mass fractions) between 0,1 % and 1,0 %. 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 12060:1997, Zinc and zinc alloys – Method of sampling – Specifications EN 13283, Zinc and zinc alloys – Secondary zinc 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12060:1997 and the following apply. 3.1 flame 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 metal is dissolved in a mixture of hydrochloric acid and hydrogen peroxide and, after adequate dilution and atomisation of the solution in a nitrous oxide-acetylene flame, the content of tin is determined by atomic absorption spectrometry at the wavelength of 235,5 nm. 5 Reagents 5.1 General During the test, use only reagents of known or analytical grade and distilled or demineralised water. 5.2 Hydrochloric acid, ρ = 1,19 g/ml. 5.3 Nitric acid,
ρ = 1,4 g/ml. SIST EN
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