1、Designation:E2027171Standard Practice forConducting Proficiency Tests in the Chemical Analysis ofMetals,Ores,and Related Materials1This standard is issued under the fixed designation E2027;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revis
2、ion,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.1NOTESection 3 corrected editorially in January 2018.1.Scope1.1 This practice provides direction for organizing andcon
3、ducting proficiency test programs in analytical chemistryfor metals,ores,and related materials.It is consistent withISO/IEC 17043 and Guide E1301.It does not address theselection and use of proficiency testing schemes by accreditingbodies.1.2 This international standard was developed in accor-dance
4、with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:
5、2E135 Terminology Relating to Analytical Chemistry forMetals,Ores,and Related MaterialsE826 Practice for Testing Homogeneity of a Metal Lot orBatch in Solid Form by Spark Atomic Emission Spec-trometryE1301 Guide for Proficiency Testing by InterlaboratoryComparisons(Withdrawn 2012)3E2972 Guide for Pr
6、oduction,Testing,and Value Assignmentof In-House Reference Materials for Metals,Ores,andOther Related Materials2.2 ISO Standards:4ISO 9001 Quality ManagementISO 13528 Statistical Methods for Proficiency Testing byInterlaboratory ComparisonISO/IEC 17025 General Requirements for the Competenceof Calib
7、ration and Testing LaboratoriesISO/IEC 17043 ConformityAssessment General Require-ments for Proficiency Testing3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this practice,refer toTerminology E135.3.2 Definition of Term Specific to This Practice:3.2.1 assigned value,nvalue that
8、serves as a declared oragreed-upon reference for comparison,normally derived fromor based on experimental work of a national or internationalorganization.3.2.1.1 DiscussionThe assigned value is given to a prop-erty or constituent of a reference material or proficiency testmaterial through technical
9、and statistical evaluation of testresults.4.Significance and Use4.1 This practice sets the basic requirements for proficiencytest programs in the chemical analysis of metals,ores,andrelated materials.It does not set specific proceduralrequirements,but does establish a framework for particularprogram
10、s,including those with either small or large numbersof participants.4.2 The data from proficiency testing programs can be usedfor value assignments for in-house reference materials devel-oped in accordance with Guide E2972.1This practice is under the jurisdiction of ASTM Committee E01 on AnalyticalC
11、hemistry for Metals,Ores,and Related Materials and is the direct responsibility ofSubcommittee E01.22 on Laboratory Quality.Current edition approved Nov.15,2017.Published December 2017.Originallyapproved in 1999.Last previous edition approved in 2009 as E2027 09.DOI:10.1520/E2027-17E01.2For referenc
12、ed 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
13、.org.4Available from International Organization for Standardization(ISO),ISOCentral Secretariat,BIBC II,Chemin de Blandonnet 8,CP 401,1214 Vernier,Geneva,Switzerland,http:/www.iso.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis int
14、ernational standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Comm
15、ittee.1 4.3 Most accreditation bodies require that laboratories par-ticipate regularly in proficiency testing programs that they haveaccepted for this purpose.Therefore,it is essential that eachprogram comply with accepted principles including technicalrequirements,statistical procedures(see Annex A
16、1),and qual-ity management(see Annex A2).5.Types of Proficiency Testing5.1 Proficiency testing techniques vary depending on thenature of the test item,the method in use and the number oflaboratories participating.The most common approach in-volves randomly selected sub-samples from a source of mate-rial being distributed simultaneously to participating testinglaboratories for concurrent testing.It is essential that all thematerial from which the participants test materials are takenbe sufficient
