Designation:D5320–96StandardTestMethodsforDeterminationof1,1,1-TrichloroethaneandMethyleneChlorideContentinStabilizedTrichloroethyleneandTetrachloroethylene1ThisstandardisissuedunderthefixeddesignationD5320;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodsprovideameansfordetermininglowlevelsof1,1,1-trichloroethaneandmethylenechlorideinvirginorreclaimedtrichloroethyleneandtetrachloroethylene.1.2Twotestmethodsarecovered,asfollows:1.2.1TestMethodA—Capillarycolumngaschromato-graphicdeterminationof1,1,1-trichloroethaneandmethylenechlorideintrichloroethyleneandtetrachloroethylene.1.2.2TestMethodB—Packedcolumngaschromatographicdeterminationof1,1,1-trichloroethaneandmethylenechlorideintrichloroethyleneandtetrachloroethylene.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.SummaryofTestMethods2.1Samplesoftrichloroethyleneortetrachloroethyleneareintroducedintoagaschromatography(GC)equippedwitheitherathermalconductivitydetector(TCD)oraflameionizationdetector(FID).Calibrationmixturescontainingknownconcentrationsofmethylenechloride,1,1,1-trichloroethane,orotherimpuritiesofinterestareintroducedintothechromatographinthesamemanner.Theamountoftheseimpuritiesinthesamplesisthencalculatedbycomparingthepeakareasofthesecompoundsfromsamplechromato-gramswiththecorrespondingpeakareasfromcalibrationstandardchromatograms.Instrumentalparametersareprovidedtoallowtheuseofeithercapillaryorpackedgaschromatog-raphycolumns.3.SignificanceandUse3.1Thesetestmethodscanbeusedtodeterminetheimpuritylevelsof1,1,1-trichloroethaneandmethylenechlorideinbothtrichloroethyleneandtetrachl...
