Designation:D3831−12StandardTestMethodforManganeseinGasolineByAtomicAbsorptionSpectroscopy1ThisstandardisissuedunderthefixeddesignationD3831;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofthetotalmanganesecontent,presentasmethylcyclopentadienylmanga-nesetricarbonyl(MMT),2ofgasolinewithintheconcentrationrangefrom0.25to40mg/Lofmanganese.1.2Thistestmethodisapplicabletoreformulatedgasolinecontainingupto12%volumemethyltertiarybutyletherorupto10%volumeethanol.Thistestmethodmaynotbeappli-cabletohighlycrackedmaterialscontaininggreaterthan18volume%olefinsasdeterminedbyTestMethodD1319(nondepentanized).1.3Thistestmethodhasbeendevelopedandtestedspecifi-callyforthedeterminationofMMTingasolineovertherecommendedconcentrationrange.Applicationofthemethodtootherconcentrationranges,tothedeterminationofMMTinothermaterials,ortothedeterminationofothermanganesecompoundsingasolinehavenotbeentested1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thepreferredconcentrationunitsaremg/Lmanga-nese.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecificwarningstatements,seeSections5and6.2.ReferencedDocuments2.1ASTMStandards:3D1319TestMethodforHydrocarbonTypesinLiquidPetro-leumProductsbyFluorescentIndicatorAdsorptionD4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4177PracticeforAutomaticSamplingofPetroleumandPetroleumProductsD6299PracticeforApplyingStatisticalQualityAssuranceandControlChartingTechniquestoEvaluateAnalyticalMeasurementSystemPerformanceD6300PracticeforDeterminationofPrecisionandBiasDataforUseinTestMethodsforPet...
