Designation:D3742–98StandardTestMethodfor1,1,1-TrichloroethaneContent1ThisstandardisissuedunderthefixeddesignationD3742;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.e1NOTE—Section10,Keywords,wasaddedinJune1994.1.Scope1.1Thistestmethodprovidesabasisforthedeterminationofthe1,1,1-trichloroethane(weight%)inthepresenceofstabilizersandimpurities,invirginorreclaimed1,1,1-trichloroethaneproducts.2.ReferencedDocuments2.1ASTMStandards:E260PracticeforPackedColumnGasChromatography23.SummaryofTestMethod3.1Gaschromatographicscansof1,1,1-trichloroethaneofknownpurityandthesampleundertestareprepared.The1,1,1-trichloroethaneconcentrationoftheunknowniscalcu-latedbycomparisonoftherespectiveelutionpeakareas.4.SignificanceandUse4.1Thistestmethodprovidesananalysisinweightpercentofthe1,1,1-trichloroethaneconcentrationofvirgin,orre-claimed1,1,1-trichloroethane.Compoundsthatco-elutewith1,1,1-trichloroethanemayinterferewiththistest.5.Apparatus5.1GasChromatographhavingthefollowingminimumcapabilities:5.1.1Temperatureprogrammablecolumnoverwithcontrolsystemscapableofmaintainingthechromatographiccolumnattheprescribedtemperature60.5°C.5.1.2Heatedsampleinjectionport.5.1.3Differentialkatharometer(hotwire),thermistor-typethermalconductivitydetectororhydrogenflamedetector.5.1.4Heateddetectorsection.5.2Syringe,10µL.5.3ChromatographicColumn,ofsuitablelengthandpack-ingsimilarto:5.3.1Column—Annealedcopperorstainlesssteeltubing,20ftby1⁄8in.(2.4mby3.2mm)inoutsidediameter.5.3.2Packing—ChromosorbWHP,380/100meshcoatedwith20weight%OV1014(orequivalent,polydimethylsiloxane)astheliquidphase.5.3.3Orothercolumnsorpackingscapableofprovidingseparationof1,1,1-trichloroethanefromstabilizersandprocessimpurities.5.4CarrierGas—Dryheliumof99.95mol%purity.5.5Standard—Uninhibited1,1,1-trichloroethaneofknownh...
