EN 12441-10:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Zink und Zinklegierungen - Chemische Analyse - Teil 10: Bestimmung von Chrom und Titan in Zinklegierungen - Spektrophotometrisches VerfahrenZinc et alliages de zinc - Analyse chimique - Partie 10: Dosage du chrome et du titane dans les alliages de zinc - Méthode spectrophotométriqueZinc and zinc alloys - Chemical analysis - Part 10: Determination of chromium and titanium in zinc alloys - Spectrophotometric 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 12441-10:2004SIST EN 12441-10:2005en01-marec-2005SIST EN 12441-10:2005SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12441-10December 2004ICS 77.040.30; 77.120.60English versionZinc and zinc alloys - Chemical analysis - Part 10: Determinationof chromium and titanium in zinc alloys - SpectrophotometricmethodZinc et alliages de zinc - Analyse chimique - Partie 10:Dosage du chrome et du titane dans les alliages de zinc -Méthode spectrophotométriqueZink und Zinklegierungen - Chemische Analyse - Teil 10:Bestimmung von Chrom und Titan in Zinklegierungen -Spektrophotometrisches 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 12441-10:2004: ESIST EN 12441-10:2005

Additional information on international co-operative tests.9 Annex B (Informative)
Graphical representation of precision data.10 Bibliography.12
This document specifies a spectrophotometric method for the determination of chromium and titanium in zinc alloys. It is applicable to the products specified in EN 988, EN 1774 and EN 12844. It is suitable for the determination of chromium and titanium contents (mass fractions) between 0,05 % and 0,50 %. 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 apply. 4 Principle For both determinations the same dissolution and oxidation step is used. Chromium is determined by spectrophotometry of the violet chromium diphenylcarbazide complex. Titanium is determined by spectrophotometry of the red chromotropic acid titanium complex, formed in a solution buffered at pH 2,9. 5 Reagents 5.1 General During the test, use only reagents of known 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 5.4 Perchloric acid, ρ = 1,6 g/ml 5.5 Sulphuric acid, ρ = 1,83 g/ml 5.6 Chloroacetic acid 5.7 Sodium hydroxide SIST EN 12441-10:2005
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