Designation:B712−93(Reapproved2012)StandardGuideforDeterminationofSodiumandPotassiumContentForSilver-CadmiumOxideContactMaterials1ThisstandardisissuedunderthefixeddesignationB712;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidedescribesproceduresforuseinconductinganalysisofsilver-cadmiumoxidematerialsforsodiumandpotassiumcontent.Theexactmethodsfortheperformanceofthistestingarenotstatedsincemanydifferentproceduresareequallyapplicable.Thisguidepointsoutspecificproceduresfordecreasingthechanceofrecognizedpotentialerrorsandspecifiesmethodsforincreasingthesensitivityofthetesting.1.2Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.ItistheresponsibilityoftheuserthisstandardtobecomefamiliarwithallhazardsincludingthoseidentifiedintheappropriateMaterialSafetyDataSheet(MSDS)forthisproduct/materialasprovidedbythemanufacturer,toestablishappropriatesafetyandhealthpractices,anddeterminetheapplicabilityofregulatorylimitationspriortouse.ForspecificprecautionsseeSections4and6.1.3WhoeverusesthisstandardshouldconsulttheMaterialSafetyDataSheetconcerningtheproductsinvolved.2.ReferencedDocuments2.1ASTMStandards:2E50PracticesforApparatus,Reagents,andSafetyConsid-erationsforChemicalAnalysisofMetals,Ores,andRelatedMaterialsE663PracticeforFlameAtomicAbsorptionAnalysis(With-drawn1997)32.2OtherDocument:OperationGuideforChemicalAnalysisofMetalsandMetalBearingOresbyAtomicAbsorptionSpectrophotometry43.SignificanceandUse3.1Thisguideisrecommendedforuseinanalyzingthesodiumandpotassiumcontentofsilver-cadmiumoxidemate-rialsandismeanttobeusedinconjunctionwithstandardmethodsofatomicabsorptionspectroscopy.Therecommendedprocedurescitemethodsforminimizingextraneoussodiumandpotassi...
