Designation:E1252−98(Reapproved2013)´1StandardPracticeforGeneralTechniquesforObtainingInfraredSpectraforQualitativeAnalysis1ThisstandardisissuedunderthefixeddesignationE1252;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—WarningstatementswereeditoriallycorrectedinJanuary2013.1.Scope1.1Thispracticecoversthespectralrangefrom4000to50cm−1andincludestechniquesthatareusefulforqualitativeanalysisofliquid-,solid-,andvapor-phasesamplesbyinfraredspectrometrictechniquesforwhichtheamountofsampleavailableforanalysisisnotalimitingfactor.Thesetechniquesareoftenalsousefulforrecordingspectraatfrequencieshigherthan4000cm–1,inthenear-infraredregion.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionsaregivenin6.5.1.2.ReferencedDocuments2.1ASTMStandards:2E131TerminologyRelatingtoMolecularSpectroscopyE168PracticesforGeneralTechniquesofInfraredQuanti-tativeAnalysisE334PracticeforGeneralTechniquesofInfraredMicro-analysisE573PracticesforInternalReflectionSpectroscopyE932PracticeforDescribingandMeasuringPerformanceofDispersiveInfraredSpectrometersE1421PracticeforDescribingandMeasuringPerformanceofFourierTransformMid-Infrared(FT-MIR)Spectrom-eters:LevelZeroandLevelOneTestsE1642PracticeforGeneralTechniquesofGasChromatog-raphyInfrared(GC/IR)Analysis3.Terminology3.1Definitions—Fordefinitionsoftermsandsymbols,refertoTerminologyE131.4.SignificanceandUse4.1Infraredspectroscopyisthemostwidelyusedtechniqueforidentifyingorganicandinorganicmaterials.Thispracticedescribes...
