ASTM_E_2972_-_15.pdf

Designation:E297215Standard Guide forProduction,Testing,and Value Assignment of In-HouseReference Materials for Metals,Ores,and Other RelatedMaterials1This standard is issued under the fixed designation E2972;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.1.Scope1.1 This document provides guidance for the implementa-tion of procedures for preparation of in-house reference mate-rials for analytical testing of metals,ores,slags,and othermaterials encountered within the metals and mining industries.1.2 This guide is applicable to the production of referencematerials only(usually for internal use)and does not apply tothe production of certified reference materials(CRMs).Mate-rials may include metals,alloys,minerals,geological materials,manufacturing intermediates,and byproducts.Samples may bein a number of physical forms including blocks,disks,rods,wires,chips,granules,powders,and liquids.1.3 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:2E32 Practices for Sampling Ferroalloys and Steel Additivesfor Determination of Chemical Composition(Withdrawn2015)3E34 Test Methods for Chemical Analysis of Aluminum andAluminum-Base AlloysE50 Practices for Apparatus,Reagents,and Safety Consid-erations for Chemical Analysis of Metals,Ores,andRelated MaterialsE55 Practice for Sampling Wrought Nonferrous Metals andAlloys for Determination of Chemical CompositionE88 Practice for Sampling Nonferrous Metals and Alloys inCast Form for Determination of Chemical CompositionE135 Terminology Relating to Analytical Chemistry forMetals,Ores,and Related MaterialsE178 Practice for Dealing With Outlying ObservationsE255 Practice for Sampling Copper and Copper Alloys forthe Determination of Chemical CompositionE415 Test Method for Analysis of Carbon and Low-AlloySteel by Spark Atomic Emission SpectrometryE716 Practices for Sampling and Sample Preparation ofAluminum and Aluminum Alloys for Determination ofChemical Composition by Spectrochemical AnalysisE826 Practice for Testing Homogeneity of a Metal Lot orBatch in Solid Form by Spark Atomic Emission Spec-trometryE877 Practice for Sampling and Sample Preparation of IronOres and Related Materials for Determination of Chemi-cal Composition and Physical PropertiesE1086 Test Method forAnalysis ofAustenitic Stainless Steelby Spark Atomic Emission SpectrometryE1329 Practice for Verification and Use of Control Charts inSpectrochemical AnalysisE1806 Practice for Sampling Steel and Iron for Determina-tion of Chemical CompositionE2857 Guide for Validating Analytical Methods2.2 ISO Standards:4ISO Guide 30 Terms and Definitions Used in Connectionwith Reference MaterialsISO Guide 30/Amd.1 Revision of definitions for referencematerial and certified reference materialISO Guide 35 Reference materialsGeneral and statisticalprinciples for certificationISO Guide 98-3 Guide to the Expression of Uncertainty inMeasurement(GUM:1995)ISO/IEC 17025 General requirements for the competence oftesting and calibration laboratories1This test method is under the jurisdiction of ASTM Committee E01 onAnalytical Chemistry for Metals,Ores,and Related Materials and is the directresponsibility of Subcommittee E01.22 on Laboratory Quality.Current edition approved Feb.15,2015.Published March 2015.DOI:10.1520/E2972-15.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available 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.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 development report,ndocument giving detailed in-formation on the preparation of an in-house reference materialand the methods of measurement used in obtaining the as-signed values.3.2.2 in-house reference material,iRM,nreference mate-rial with documented homogeneity that is intended for use forquality control purposes,calibration,evaluation of acalibration,or standardization whose values may have limitedtraceability and for which rigorously derived uncertainty infor-mation is not mandatory.3.2.3 method of demonstrated acc