Designation:E2027−09StandardPracticeforConductingProficiencyTestsintheChemicalAnalysisofMetals,Ores,andRelatedMaterials1ThisstandardisissuedunderthefixeddesignationE2027;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeprovidesdirectionfororganizingandconductingproficiencytestprogramsinanalyticalchemistryformetals,ores,andrelatedmaterials.ItisconsistentwithISOGuide43andGuideE1301.Itdoesnotaddresstheselectionanduseofproficiencytestingschemesbyaccreditingbodies.2.ReferencedDocuments2.1ASTMStandards:2E135TerminologyRelatingtoAnalyticalChemistryforMetals,Ores,andRelatedMaterialsE826PracticeforTestingHomogeneityofaMetalLotorBatchinSolidFormbySparkAtomicEmissionSpec-trometryE1187TerminologyRelatingtoConformityAssessment(Withdrawn2006)3E1301GuideforProficiencyTestingbyInterlaboratoryComparisons(Withdrawn2012)3E1724GuideforTestingandCertificationofMetal,Ore,andMetal-RelatedReferenceMaterials(Withdrawn2010)32.2ISOStandards:4ISO17025GeneralRequirementsfortheCompetenceofCalibrationandTestingLaboratoriesISOGuide43ProficiencyTestingbyInterlaboratoryCom-parisonsISOGuide9000QualityManagementandQualitySystemElements3.Terminology3.1Definitions—Forformaldefinitionsrelatedtolaboratoryaccreditation,TerminologyE1187applies.3.2Forotherdefinitionsoftermsusedinthepractice,refertoTerminologyE135.4.SignificanceandUse4.1Thispracticesetsthebasicrequirementsforproficiencytestprogramsinthechemicalanalysisofmetals,ores,andrelatedmaterials.Itdoesnotsetspecificproceduralrequirements,butdoesestablishaframeworkforparticularprograms,includingthosewitheithersmallorlargenumbersofparticipants.(Warning—Thedatafromproficiencytestingprogramsmustneverbeusedtoassigncertificationvaluestothematerialsusedintheprogram.Theelementsofaproperlyconceivedandimplementedcertificationprogra...
