Designation:E2105−00(Reapproved2010)StandardPracticeforGeneralTechniquesofThermogravimetricAnalysis(TGA)CoupledWithInfraredAnalysis(TGA/IR)1ThisstandardisissuedunderthefixeddesignationE2105;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoverstechniquesthatareofgeneraluseinthequalitativeanalysisofsamplesbythermogravimetricanaly-sis(TGA)coupledwithinfrared(IR)spectrometrictechniques.ThecombinationofthesetechniquesisoftenreferredtoasTGA/IR.1.2AsampleheatedinaTGAfurnaceusingapredeter-minedtemperatureprofiletypicallyundergoesoneormoreweightlosses.Materialsevolvedduringtheseweightlossesarethenanalyzedusinginfraredspectroscopytodeterminechemi-calidentity.Theanalysismayinvolvecollectingdiscreteevolvedgassamplesor,morecommonly,mayinvolvepassingtheevolvedgasthroughaheatedflowcellduringtheTGAexperiment.ThegeneraltechniquesofTGA/IRandothercorrespondingtechniques,suchasTGAcoupledwithmassspectroscopy(TGA/MS),aswellas,TGA,usedinconjunctionwithGC/IR,aredescribedinthereferencedliterature(1-4).21.3Somethermalanalysisinstrumentsaredesignedtoperformboththermogravimetricanalysisanddifferentialscan-ningcalorimetrysimultaneously.Thistypeofinstrumentissometimescalledasimultaneousthermalanalyzer(STA).TheevolvedgasanalysisperformedwithanSTAinstrument(5)issimilartothatwithaTGA,andso,wouldbecoveredbythispractice.Withuseofasimultaneousthermalanalyzer,thecoupledmethodtypicallyislabeledSTA/IR.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstatementdoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMSta...
