Designation:E2972−15StandardGuideforProduction,Testing,andValueAssignmentofIn-HouseReferenceMaterialsforMetals,Ores,andOtherRelatedMaterials1ThisstandardisissuedunderthefixeddesignationE2972;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisdocumentprovidesguidancefortheimplementa-tionofproceduresforpreparationofin-housereferencemate-rialsforanalyticaltestingofmetals,ores,slags,andothermaterialsencounteredwithinthemetalsandminingindustries.1.2Thisguideisapplicabletotheproductionofreferencematerialsonly(usuallyforinternaluse)anddoesnotapplytotheproductionofcertifiedreferencematerials(CRMs).Mate-rialsmayincludemetals,alloys,minerals,geologicalmaterials,manufacturingintermediates,andbyproducts.Samplesmaybeinanumberofphysicalformsincludingblocks,disks,rods,wires,chips,granules,powders,andliquids.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E32PracticesforSamplingFerroalloysandSteelAdditivesforDeterminationofChemicalComposition(Withdrawn2015)3E34TestMethodsforChemicalAnalysisofAluminumandAluminum-BaseAlloysE50PracticesforApparatus,Reagents,andSafetyConsid-erationsforChemicalAnalysisofMetals,Ores,andRelatedMaterialsE55PracticeforSamplingWroughtNonferrousMetalsandAlloysforDeterminationofChemicalCompositionE88PracticeforSamplingNonferrousMetalsandAlloysinCastFormforDeterminationofChemicalCompositionE135TerminologyRelatingtoAnalyticalChemistryforMetals,Ores,andRelatedMaterialsE178PracticeforDealingWithOutlyingObservationsE255PracticeforSamplingCopperandCopperAlloysfortheDeterminationofChemicalCompositionE415TestMethodforAn...
