Designation:D3493−21StandardTestMethodforCarbonBlack—OilAbsorptionNumberofCompressedSample(COAN)1ThisstandardisissuedunderthefixeddesignationD3493;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheprocedureforthemechani-calcompressionofacarbonblacksampleandthedetermina-tionoftheoilabsorptionnumberofthecompressedsample.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1765ClassificationSystemforCarbonBlacksUsedinRubberProductsD1799PracticeforCarbonBlack—SamplingPackagedShipmentsD1900PracticeforCarbonBlack—SamplingBulkShip-mentsD2414TestMethodforCarbonBlack—OilAbsorptionNumber(OAN)D4821GuideforCarbonBlack—ValidationofTestMethodPrecisionandBiasD4483PracticeforEvaluatingPrecisionforTestMethodStandardsintheRubberandCarbonBlackManufacturingIndustries3.SummaryofTestMethod3.1Asampleofcarbonblackiscompressedfourtimesinacompressioncylinderatapressureof165MPa(24000psi)andthentestedinanabsorptometertodeterminetheoilabsorptionnumber.3.2n-Dibutylphthalate,paraffinoil,orEFAoilisaddedbymeansofaconstant-rateburettothecompressedsampleofcarbonblackinthemixerchamberofanabsorptometer.Asthesampleabsorbstheoil,themixtur...
