Designation:D1946−90(Reapproved2015)´1StandardPracticeforAnalysisofReformedGasbyGasChromatography1ThisstandardisissuedunderthefixeddesignationD1946;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—Section5updatededitoriallyinDecember2015.1.Scope1.1Thispracticecoversthedeterminationofthechemicalcompositionofreformedgasesandsimilargaseousmixturescontainingthefollowingcomponents:hydrogen,oxygen,nitrogen,carbonmonoxide,carbondioxide,methane,ethane,andethylene.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E260PracticeforPackedColumnGasChromatography3.SummaryofPractice3.1Componentsinasampleofreformedgasarephysicallyseparatedbygaschromatographyandcomparedtocorrespond-ingcomponentsofareferencestandardseparatedunderidenticaloperatingconditions,usingareferencestandardmixtureofknowncomposition.Thecompositionofthere-formedgasiscalculatedbycomparisonofeitherthepeakheightorarearesponseofeachcomponentwiththecorre-spondingvalueofthatcomponentinthereferencestandard.4.SignificanceandUse4.1Theinformationaboutthechemicalcompositioncanbeusedtocalculatephysicalpropertiesofthegas,suchasheating(calorific)valueandrelativedensity.Combustioncharacteristics,productsofcombustion,toxicity,andinter-changeabilitywithotherfuelgasesmayalsobeinferredfromthechemicalcomposition.5.Apparatus5.1Detector—Thedetectorshallbeathermalconductivitytypeoritsequivalentinstabilityandsensitivity.Thethermalconductivitydetectormustbesufficientlysensitivetoproduceasig...
