BS ISO BRITISH STANDARD 22961:2008 Titanium and titanium alloys Determination of iron Atomic absorption spectrometry ICS 77.120.50 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BSISO22961:2008 National foreword This British Standard is the UK implementation of ISO 22961:2008. The UK participation in its preparation was entrusted to Technical Committee NFE/35, Light metals and their alloys. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was Amendments/corrigenda issued sincepublication published under the authority of the Standards Policy and Date Comments Strategy Committee on30May2008 BSI 2008 ISBN 9780580576348 BS IS0 22961:2008 ISO INTERNATIONAL STANDARD 22961 First edition 2008-01-15 Titanium and titanium alloys - DeterminationofironAtomic absorption spectrometry Titane et alliages de titane-Dosage dufer-Spectrometrie d'absorptionatomique Reference number ISO 22961:2008(E) ISO ii BS ISO 22961:2008 Contents Page Foreword iv 1 Scope. 2 Normative references. 3 Principle.. 4 Reagents.. 5 Apparatus. 2 6 Sample. 7 Procedure 8 Expressionofresults. 5 9 Precision 6 Bibliography. ili BSIS0 22961:2008 Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through isO non-governmental, in liaison_with isO, also take part in the work. iso collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75%of the member bodies casting a vote rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO22961 was prepared by Technical Committee ISO/TC 79, Light metals and their alloys, Subcommittee SC 11, Titanium. iv BSISO22961:2008 TitaniumandtitaniumalloysDeterminationofironAtomic absorption spectrometry Scope This International Standard specifies an atomic absorption spectrometric method for the determination of the mass fraction of iron in titanium and titanium alloys. The method is applicable to titanium and titanium alloys with a mass fraction of iron in the range from 0,o05 % to 2,0 %. 2 Normativereferences The following referenced documents are indispensable for the application of this document. For dated document (including any amendments) applies. ISO384:1978,LaboratoryglasswarePrinciplesofdesignandconstructionofvolumetricglassware Iso648:-1),Laboratoryglassware-Singlevolumepipettes Iso1042:1998,Laboratoryglassware-One-markvolumetricflasks Iso4787:1984,Laboratoryglassware-Volumetricglassware—Methodsforuseandtestingofcapacity 3 Principle Dissolve the test portion in hydrochloric acid and hydrofluoric acid. Add nitric acid to oxidize titanium, iron and other elements. Then add boric acid, determine the iron concentration in the test portion using an atomic absorptionspectrometer Reagents 4.1 General During the analysis, use only reagents of recognized analytical grade and water that complies with grade 2 of ISO3696. 1)To be published. (Revision of ISO 648:1977) 1