Designation:D5762−12StandardTestMethodforNitrogeninPetroleumandPetroleumProductsbyBoat-InletChemiluminescence1ThisstandardisissuedunderthefixeddesignationD5762;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofnitrogeninliquidhydrocarbons,includingpetroleumprocessstreamsandlubricatingoilsintheconcentrationrangefrom40to10000µg⁄gnitrogen.Forlighthydrocarbonscontaininglessthan100µg/gnitrogen,TestMethodD4629canbemoreappropriate.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecificwarningstatementsaregiveninSection6,7.1,8.2,and8.2.2.2.ReferencedDocuments2.1ASTMStandards:2D4057PracticeforManualSamplingofPetroleumandPetroleumProductsD4177PracticeforAutomaticSamplingofPetroleumandPetroleumProductsD4629TestMethodforTraceNitrogeninLiquidPetroleumHydrocarbonsbySyringe/InletOxidativeCombustionandChemiluminescenceDetectionD6299PracticeforApplyingStatisticalQualityAssuranceandControlChartingTechniquestoEvaluateAnalyticalMeasurementSystemPerformance3.SummaryofTestMethod3.1Ahydrocarbonsampleisplacedonasampleboatatroomtemperature.Thesampleandboatareadvancedintoahigh-temperaturecombustiontubewherethenitrogenisoxi-dizedtonitricoxide(NO)inanoxygenatmosphere.TheNOcontactsozoneandisconvertedtoexcitednitrogendioxide(NO2).ThelightemittedastheexcitedNO2decaysisdetectedbyaphotomultipliertube,andtheresultingsignalisameasureofthenitrogencontainedinthesample.4.SignificanceandUse4.1Manynitrogencompoundscancontaminaterefinerycatalysts.Theytend...
