Designation:D4424−09(Reapproved2014)StandardTestMethodforButyleneAnalysisbyGasChromatography1ThisstandardisissuedunderthefixeddesignationD4424;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthegaschromatographicanaly-sisofcommercialbutylenes,butyleneconcentrates,andbutane-butylenemixtures.1.2Thistestmethoddoesnotcoverhigh-puritybutene-1orhigh-purityisobutenestreams,orboth.However,itispossiblethatoneormorecolumnslistedinAppendixX3maybecapableoftheseparationnecessaryforhigh-purityanalyses.1.3Thistestmethodisdesignedtocoverthecomponentslistedbelowatabout0.05%orgreater.Itisnotintendedfortracehydrocarbonanalysis.Componentstobedeterminedare:propane,propylene,isobutane,n-butane,butene-1,isobutene,trans-butene-2,cis-butene-2,1,3-butadiene,isopentane,n-pentane.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesstatedininch-poundunitsareforinfor-mationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcernsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificwarningstatements,see5.3.1.2.ReferencedDocuments2.1ASTMStandards:2E260PracticeforPackedColumnGasChromatography3.SummaryofTestMethod3.1Thesampleisseparatedinagaschromatographsystemusingapackedchromatographiccolumnwitheitherheliumorhydrogenasthecarriergas.Theseparatedcomponentsofthesamplearedetectedbyeitherathermalconductivitydetectororbyaflameionizationdetector.Calibrationdataareobtainedbyusingeitherrelativeresponsefactorsorbyusingastandardcalibrationblend.4.SignificanceandUse4.1Thistestmethodcouldbeusedtodeterminebutylenestreamcompositionforcustodytransferpayments.Itisalsocapableofprovidingdatanecessarytoevaluateprocessingrequireme...
