ASTM_E_2626_-_08e1.pdf

Designation:E2626081Standard Guide forSpectrometric Analysis of Reactive and Refractory Metals1This standard is issued under the fixed designation E2626;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorial corrections were made throughout in October 2009.1.Scope1.1 This guide covers a variety of analytical techniques thathave proven to be acceptable for the analysis of the reactiveand refractory metals titanium,zirconium,niobium,hafnium,tantalum,molybdenum,tungsten,and vanadium.1.2 The principles and techniques in this guide can be usedby ISO 17025 compliant laboratories that need to implementother performance-based test methods or need to document andvalidate extensions of standard test methods,or non-standardtest methods.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterE50 Practices for Apparatus,Reagents,and Safety Consid-erations for Chemical Analysis of Metals,Ores,andRelated MaterialsE135 Terminology Relating to Analytical Chemistry forMetals,Ores,and Related MaterialsE539 Test Method forAnalysis of TitaniumAlloys by X-RayFluorescence SpectrometryE882 Guide for Accountability and Quality Control in theChemical Analysis LaboratoryE1097 Guide for Determination of Various Elements byDirect Current Plasma Atomic Emission SpectrometryE1184 Practice for Determination of Elements by GraphiteFurnace Atomic Absorption SpectrometryE1479 Practice for Describing and Specifying Inductively-Coupled Plasma Atomic Emission SpectrometersE1552 Test Method for Determining Hafnium in Zirconiumand ZirconiumAlloys By Direct Current PlasmaAtomicEmission SpectrometryE1601 Practice for Conducting an Interlaboratory Study toEvaluate the Performance of an Analytical MethodE1621 Guide for X-Ray Emission Spectrometric AnalysisE1770 Practice for Optimization of Electrothermal AtomicAbsorption Spectrometric EquipmentE2371 Test Method for Analysis of Titanium and TitaniumAlloys by Atomic Emission Plasma SpectrometryE2437 Practice for Designing and Validating Performance-Based Test Methods for the Analysis of Metals,Ores,andRelated MaterialsE2438 Practice for Implementing Standard PerformanceBased Test Methods for the Analysis of Metals,Ores,andRelated Materials2.2 ISO Standards:3ISO 17025 General Requirements for the Competence ofTesting and Calibration LaboratoriesISO Guide 32 Calibration in Analytical Chemistry and Useof Certified Reference Materials3.Terminology3.1 DefinitionsFor definitions of terms used in this guide,refer to Terminology E135.3.2 Definitions of Terms Specific to This Standard:3.2.1 reactive metal,na metal,such as titanium orzirconium,that readily reacts with the environment.It has astrong affinity for oxygen and nitrogen and forms very stablecompounds that passivate in thin layers.When the reactivecoating is damaged,it self heals by reaction with the atmo-sphere.1This guide is under the jurisdiction of ASTM Committee E01 on AnalyticalChemistry for Metals,Ores,and Related Materials and is the direct responsibility ofSubcommittee E01.06 on Ti,Zr,W,Mo,Ta,Nb,Hf,Re.Current edition approved June 15,2008.Published July 2008.DOI:10.1520/E2626-08E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.2 refractory metal,na metal,such as hafnium,molybdenum,niobium,tantalum,vanadium,or tungsten,char-acterized by very high melting points,above about 1900 C,that oxidizes at temperatures far below its melting point.4.Significance and Use4.1 Test methods for chemical analysis of reactive andrefractory metals are primarily intended to test such materialsfor compliance with compositional specifications.It is assumedthat all who use this guide will be trained analysts capable ofperforming common laboratory procedures skillfully andsafely.It is expected that work will be performed in a properlyequipped laboratory under appropriate quality control practicessuch as those described in Guide E882 and Practice E2437,aswell as in ISO 17025 and ISO Gui