Designation:D6971−22StandardTestMethodforMeasurementofHinderedPhenolicandAromaticAmineAntioxidantContentinNon-zincTurbineOilsbyLinearSweepVoltammetry1ThisstandardisissuedunderthefixeddesignationD6971;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthevoltammetricdeterminationofhinderedphenolandaromaticamineantioxidantsinneworin-servicetypenon-zincturbineoilsinconcentrationsfrom0.0075%bymassuptoconcentrationsfoundinnewoilsbymeasuringtheamountofcurrentflowataspecifiedvoltageintheproducedvoltammogram.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD2272TestMethodforOxidationStabilityofSteamTur-bineOilsbyRotatingPressureVesselD4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4175TerminologyRelatingtoPetroleumProducts,LiquidFuels,andLubricantsD4378PracticeforIn-ServiceMonitoringofMineralTur-bineOilsforSteam,Gas,andCombinedCycleTurbinesD6224PracticeforIn-ServiceMonitoringofLubricatingOilforAuxiliaryPowerPlantEquipmentD6810TestMethodforMeasurementofHinderedPhenolicAntioxidantContentinNon-ZincTurbineOilsbyLinearSweepVoltammetry2.2ISOStandards:3ISO6743Part4,Lubricants,IndustrialOils,andRelatedProducts3.Terminology3.1Definitions:3.1.1SeeTerminologyD4175foramoreextensive...
