EN 12441-10:2004

Zinc and zinc alloys - Chemical analysis - Part 10: Determination of chromium and titanium in zinc alloys - Spectrophotometric method

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 %.

Zink und Zinklegierungen - Chemische Analyse - Teil 10: Bestimmung von Chrom und Titan in Zinklegierungen - Spektrophotometrisches Verfahren

Dieses Dokument legt ein spektrophotometrisches Verfahren für die Bestimmung von Chrom und Titan in Zinkle-
gierungen fest. Das Verfahren ist auf die in EN 988, EN 1774 und EN 12844 festgelegten Produkte anwendbar.
Es ist geeignet für die Bestimmung von Chrom- und Titangehalten (Massenanteil) zwischen 0,05 % und 0,50 %.

Zinc et alliages de zinc - Analyse chimique - Partie 10: Dosage du chrome et du titane dans les alliages de zinc - Méthode spectrophotométrique

Ce document décrit une méthode d�analyse permettant de déterminer la teneur en chrome et en titane des
alliages de zinc, par spectrophotométrie. Elle est applicable aux produits spécifiés dans les EN 988, EN 1774
et EN 12844.
Elle convient au dosage de fractions massiques de chrome et de titane comprises entre 0,05 % et 0,50 %.

Cink in cinkove zlitine – Kemična analiza – 10. del: Določevanje kroma in titana v cinkovih zlitinah – Metoda spektrofotometrije

General Information

• Status: Published
• Publication Date: 21-Dec-2004
• ICS: 77.040.30 - Chemical analysis of metals
• ICS: 77.120.60 - Lead, zinc, tin and their alloys
• Technical Committee: CEN/TC 209 - Zinc and zinc alloys
• Drafting Committee: CEN/TC 209/WG 6 - Methods of analysis and testing
• Current Stage: 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
• Start Date: 02-Dec-2024
• Completion Date: 02-Dec-2024
• Ref Project: SIST EN 12441-10:2005 - Zinc and zinc alloys - Chemical analysis - Part 10: Determination of chromium and titanium in zinc alloys - Spectrophotometric method

Overview

EN 12441-10:2004 (CEN) defines a spectrophotometric chemical analysis method for the determination of chromium (Cr) and titanium (Ti) in zinc and zinc alloys. The procedure is applicable to products covered by EN 988, EN 1774 and EN 12844 and is intended for mass fractions between 0.05 % and 0.50 %. The standard specifies sample preparation, reagents, instrumental settings and calibration procedures required for reliable spectrophotometric measurement.

Key topics and requirements

• Scope and applicability: Valid for chromium and titanium in zinc alloys within 0.05–0.50 % (mass fraction) and for the products listed in EN 988, EN 1774 and EN 12844.
• Sampling: Test samples shall be selected and prepared according to EN 12060.
• Sample preparation: Dissolution and oxidation steps use hydrochloric, nitric and perchloric acids to ensure chromium is present as Cr(VI).
• Analytical reactions:
  • Chromium: formation of the violet chromium–diphenylcarbazide complex; measured at 540 nm.
  • Titanium: formation of the red chromotropic acid–titanium complex in pH 2.9 buffer; measured at 470 nm.
• Instrumentation: Spectrophotometer with 1 cm optical cells (wavelengths 540 nm and 470 nm). Glassware must be cleaned (boiling aqua regia) as specified.
• Calibration and standards: Preparation of chromium and titanium standard solutions and construction of calibration curves spanning 0–0.50 % content equivalents for 1 cm cells.
• Quality control: Mandatory blank determinations and reporting of individual and mean results. The standard includes interlaboratory precision data (repeatability and reproducibility) from cooperative trials.

Practical applications and users

• Who uses it:
  • Metallurgical and foundry laboratories performing composition control on zinc alloys.
  • Quality assurance teams in producers of zinc alloy ingots, castings and rolled products.
  • Third‑party testing laboratories and conformity assessment bodies verifying compliance with EN 988 / EN 1774 / EN 12844.
• Use cases:
  • Routine quality control to verify Cr and Ti contents during alloy production.
  • Incoming material inspection and compliance testing for architectural and foundry specifications.
  • Supporting material certification and traceability where precise Cr/Ti quantification in the 0.05–0.50 % range is required.

Related standards

• EN 12441 series (Parts 1–11) - other chemical analysis methods for zinc alloys (Al, Mg, Pb, Cd, Fe, Sn, Ni, Si, etc.)
• EN 988, EN 1774, EN 12844 - product specifications referenced by this method
• EN 12060 - sampling method for zinc and zinc alloys
• ISO 5725 series - accuracy, repeatability and reproducibility principles used in the standard’s precision assessment

Keywords: EN 12441-10:2004, zinc and zinc alloys, spectrophotometric method, chromium determination, titanium determination, chemical analysis, CEN, mass fraction 0.05–0.50 %.

Standards Content (Sample)

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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