ASTM_E_1724_-_95_2001.pdf

Designation:E 1724 95(Reapproved 2001)Standard Guide forTesting and Certification of Metal,Ore,and Metal-RelatedReference Materials1This standard is issued under the fixed designation E 1724;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(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide describes procedures to be considered for thetesting and certification of metal,ore,and metal-related refer-ence materials in the form of blocks,disks,rods,wires,chips,and powders.1.2 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:E 32 Practices for Sampling Ferroalloys and SteelAdditivesfor Determination of Chemical Composition2E 34 Test Methods for ChemicalAnalysis ofAluminum andAluminum-Base Alloys2E 50 Practices for Apparatus,Reagents,and Safety Consid-erations for ChemicalAnalysis of Metals,Ores and RelatedMaterials2E 55 Practice for Sampling Wrought Nonferrous Metals andAlloys for Determination of Chemical Composition2E 59 Practice for Sampling Steel and Iron for Determinationof Chemical Composition2E 88 Practice for Sampling Nonferrous Metals and Alloysin Cast Form for Determination of Chemical Composition2E 135 Terminology Relating to Analytical Chemistry forMetals,Ores,and Related Materials2E 178 Practice for Dealing with Outlying Observations3E 255 Practice for Sampling Copper and Copper Alloys forthe Determination of Chemical Composition2E 350 Test Methods for ChemicalAnalysis of Carbon Steel,Low-Alloy Steel,Silicon Electrical Steel,Ingot Iron,andWrought Iron2E 351 Test Methods for Chemical Analysis of Cast IronAll Types2E 716 Practices for Sampling Aluminum and AluminumAlloys for Spectrochemical Analysis2E 826 Practice for Testing Homogeneity of Materials for theDevelopment of Reference Materials2E 877 Practice for Sampling and Sample Preparation of IronOres and Related Materials2E 1019 Test Method for Determination of Carbon,Sulfur,Nitrogen,and Oxygen in Steel and Iron22.2ISO Standards:ISO Guide 30 Terms and Definitions Used in ConnectionWith Reference Materials4ISO Guide 31 Contents of Certificates of Reference Mate-rials4ISO Guide 33Uses of Certified Reference Materials4ISO Guide 35Certification of Reference MaterialsGeneral and Statistical Principles43.Terminology3.1 DefinitionsFor definitions of terms used in this guide,refer to Terminology E 135.3.2 Definitions of Terms Specific to This Standard:3.2.1 certification reporta document giving detailed in-formation,supplementary to that contained in a certificate,onthe preparation of the material and the methods of measure-ment used in obtaining the certified value(s)for a givenreference material.It includes a summary of the resultsobtained(including a description of all factors affecting accu-racy)and a description of the way in which the results weretreated statistically.3.2.2 certified reference material(CRM)reference mate-rial accompanied by a certificate,one or more of whoseproperty values are certified by a procedure which establishesits traceability to an accurate realization of the unit in which theproperty values are expressed;each certified value is accom-panied by an uncertainty at a stated level of confidence(fromISO Guide 30).3.2.3 certifying bodya technically competent body(orga-nization or firm,public or private)that issues a referencematerial certificate which provides the information detailed inISO Guide 31.1This guide is under the jurisdiction of ASTM Committee E01 on AnalyticalChemistry for Metals,Ores,and Related Materials and is the direct responsibility ofSubcommittee E01.22 on Statistics and Quality Control.Current edition approved Aug.15,1995.Published October 1995.2Annual Book of ASTM Standards,Vol 03.05.3Annual Book of ASTM Standards,Vol 14.02.4Available from American National Standards Institute,11 West 42nd St.,13thFloor,New York,NY 10036.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.3.2.4 comparative analytical methodan analytical proce-dure that requires the use of CRMs,reference materials(RMs),or,in certain instances,primary chemical standards for cali-bration.Methods vary widely in the number of such CRMsrequired and the degree to which such CRMs must matchunknown samples.3.2.5 definitive analytical methodan analytical procedurethat does not require the use of CRMs,RMs,or primarychemical standards to achieve accurate results.Examplesinclude gravimetry,coulometry,specific titrimetric methods,and isotope dilution mass spectrometry.Each individual labo-ratory should validate its performanc