Designation:D5056−15StandardTestMethodforTraceMetalsinPetroleumCokebyAtomicAbsorption1ThisstandardisissuedunderthefixeddesignationD5056;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoverstheanalysisforthecommonlydeterminedtracemetals(aluminum,calcium,iron,nickel,silicon,sodium,andvanadium)inlaboratoryanalysissamplesofrawandcalcinedpetroleumcokebyatomicabsorptionspectroscopy.1.2TheelementalconcentrationrangesforwhichthistestmethodisapplicableandthelimitsofdetectionofthistestmethodarelistedinTable1.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forwarningstatements,seeSections8–10.2.ReferencedDocuments2.1ASTMStandards:2D346PracticeforCollectionandPreparationofCokeSamplesforLaboratoryAnalysisD6299PracticeforApplyingStatisticalQualityAssuranceandControlChartingTechniquestoEvaluateAnalyticalMeasurementSystemPerformanceD1193SpecificationforReagentWater3.SummaryofTestMethod3.1Arepresentativesampleofthepetroleumcokeisashedat525°Cunderspecifiedconditions.Theashisfusedwithlithiumtetraborate(Li2B4O7),orlithiummetaborate(LiBO3).Themeltisdissolvedindilutehydrochloricacid(HCl),andtheresultantsolutionisanalyzedbyatomicabsorptionspectros-copyforthefollowingelements:aluminum,calcium,iron,nickel,silicon,sodium,andvanadium.4.SignificanceandUse4.1Thepresenceandconcentrationofvariousmetallicelementsinapetroleumcokearemajorfactorsinthesuitabilityofthecokeforvarioususes.Thistestmethodprovidesameansofmeasuringtheamountsofthosemetallicelementsinthecokesample.4.2Theconcentrationoftheseelementsisonefactorind...
