Designation:E2294−03(Reapproved2013)StandardPracticeforProofSilverCorrectionsinMetalBearingOres,Concentrates,andRelatedMaterialsbyFireAssayGravimetry1ThisstandardisissuedunderthefixeddesignationE2294;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthedeterminationoffireassaycorrectionforsilver,utilizingproofsilver,ores,concentrates,andrelatedmetallurgicalmaterials.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.(SeeTestMethodsE1335,PracticesE50,GuideE882,andISOGuide35:1989.)2.ReferencedDocuments2.1ASTMStandards:2E29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE50PracticesforApparatus,Reagents,andSafetyConsid-erationsforChemicalAnalysisofMetals,Ores,andRelatedMaterialsE135TerminologyRelatingtoAnalyticalChemistryforMetals,Ores,andRelatedMaterialsE882GuideforAccountabilityandQualityControlintheChemicalAnalysisLaboratoryE1335TestMethodsforDeterminationofGoldinBullionbyFireAssayCupellationAnalysis2.2OtherDocuments:3ISOGuide35:1989CertificationofReferenceMaterials-GeneralandStatisticalPrinciplesISO10378:1994CopperSulfideConcentrates–Determina-tionofGoldandSilverContents–FireAssayGravimetricandAtomicAbsorptionSpectrometricMethod3.Terminology3.1Definitions—FordefinitionsoftermsusedinthisPractice,refertoTerminologyE135.4.SummaryofPractice4.1Intheprocessoffireassay,silverlossesoccur.Proofsilveriscarriedthroughtheassayfusionandcupellationprocedurestodeterminelossesthatcanprovidethefireassaysilvercorrectionva...
