9009276002787722TDesignation:D3229-83AMERICANSOCIETYFORTESTINGANDMATERIALSH-24-/5AnAmencanNationalStandard1916RaceSt.,Philadelphia,Pa.49103ReprintedfromtheAnnualBookofASTMStandards,CopyrightASTMIfnotlistedinthecurrentcombinedindex.willappearinthenexteditionStandardTestMethodforSPECTROMETRY'LOWLEVELSOFLEADINGASOLINEBYX-RAYThisstandardisissuedunderthefixeddesignationD3229;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.oftotalleadingasolineintherangefrom0.010to0.50gPb/U.S.gai.1.2Thisstandardmayinvolvehazardousma-terials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyprob-lemsassociatedwithitsuse.Itistheresponsibil-ityofwhoeverusesthisstandardtoconsultandestablishappropriatesafetvandhealthpracticesanddeterminetheapplicabilityofregulatorylimi-tationspriortouse.Forspecificprecautionarystatements,see6.3,6.4,6.5,and6.7.2.ApplicableDocuments2.1ASTMStandards:D2599TestMethodforLeadinGasolinebyD3341TestMethodforLeadinGasoline-\\,>\,1>,,)Clx-bySpectromet$IodineMonochlorideMethod33.SummaryofMethod3.ITwentymillilitresofsampleismixedthor-oughlywith2mLofbismuthinternalstandardsolution.ThemixtureisplacedintheX-raybeamofaspectrometerandtheintensitiesoftheleadLa,radiationat1.175A,thebismuthLalradiationat1.144&andabackgroundat1.194Aaredetermined.Ablank,madewithIsooctaneandbismuthinternalstandard,isrunushgthesameprocedure.Theleadconcentrationismea-suredbydeterminingtheratioofthenetcountingrateatI.i75Atothegrosscountingrateati.144Aforthesample,subtractingthecomparableratiofoundfortheblank,andcomparingtoapreviouslypreparedcalibrationcurveofconcen-trationversusthesameratios.4.SignificanceandUse4.1Thistestmethodisusedtoensurecom-20035.Apparatus5.IX-raySpectrometer,capableofmeasuringradiationsmentionedin3.1andofbeingOper-atedunderthefollowinginstrumentalcondi...
