Designation:D7662−15StandardTestMethodforCarbonContentinCarbonBlackFeedstockOils1ThisstandardisissuedunderthefixeddesignationD7662;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheinstrumentaldeterminationofcarboncontentinsamplesofcarbonblackfeedstockoils.Valuesobtainedrepresentthetotalcarboncontent.1.2Thistestmethodisapplicabletocarbonblackfeedstockoilsderivedfrompetroleum,coal,andothersourceswhichincludefueloils,residues,tars,pitches,reclaimedoils,andsimilarmaterialsthatarenormallyhandledasliquids.Thistestmethodisapplicabletoproductsthattypicallycontain75to94mass%carbon.1.3Theresultsofthesetestscanbeexpressedasmass%carbon.1.4Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4177PracticeforAutomaticSamplingofPetroleumandPetroleumProductsD4483PracticeforEvaluatingPrecisionforTestMethodStandardsintheRubberandCarbonBlackManufacturingIndustriesD7633TestMethodforCarbonBlack—CarbonContent3.SummaryofTestMethod3.1Inthistestmethod,asampleoffeedstockoilisweighedinacombustionboatcontainingatungstenoxidebasedacceleratorandthecarboncontentisdeterminedbyplacingtheboatinatubefurnaceat1350°Cinanair-oroxygen-enrichedatmosphereresultingincompletecombustion.Carboninthesampleiscompletelyoxidizedtocarbondioxide.Moistureandparticulatesareremovedfromthegasstreambytrapsfilledwithanhydrousmagnesiumperchlorate.Thegasstreamisthenpassedthroughacellinwhichca...
