Designation:D7060−20StandardTestMethodforDeterminationoftheMaximumFlocculationRatioandPeptizingPowerinResidualandHeavyFuelOils(OpticalDetectionMethod)1ThisstandardisissuedunderthefixeddesignationD7060;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversaprocedureforquantifyingthemaximumflocculationratiooftheasphaltenesintheoilandthepeptizingpoweroftheoilmedium,byanautomaticinstrumentusinganopticaldevice.1.2Thistestmethodisapplicabletoatmosphericorvacuumdistillationresidues,thermallycrackedresidue,intermediateandfinishedresidualfueloils,containingatleast1%bymassasphaltenes.Thistestmethodhasnotbeendevelopedforasphalts.NOTE1—Anopticalprobedetectstheformationofflocculatedas-phaltenes.Thestartofflocculationisinterpretedwhenasignificantandsustainedincreaseinrate-of-changeofsignal,asmeasuredbytheopticalprobe,ensuresflocculationisinprogress.Thestartofflocculationcanbedetectedunambiguouslywhenthesamplecontainsatleast1%massasphaltenesasmeasuredbyTestMethodD6560.NOTE2—ThistestmethodisapplicabletoproductstypicalofSpecifi-cationD396—Grades5L,5H,and6,andSpecificationD2880—Grades3-GTand4-GT.1.3Thistestmethodwasevaluatedinaninterlaboratorystudyinthenominalrangeof32to76forthemaximumflocculationratioandinthenominalrangeof36to95forpeptizingpower.NOTE3—Thenominalrangeisdeterminedby(min.samplemean—Reproducibility)to(max.samplemean+Reproducibility).1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinac...
