Designation:D3834–93StandardTestMethodforPurityofVinylChlorideMonomerbyGasChromatography1ThisstandardisissuedunderthefixeddesignationD3834;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thegeneralavailabilityofgaschromatographyinprac-ticallyeverylaboratoryandtheinherentsensitivityinthedetectionoftraceconstituentsindicatethatthetechniquewouldqualifyasastandardtestmethod.Withthisone-steptechnique,impuritiescanbedeterminedinarangethatincludesmajorconstituentsandpartspermillionimpurities.1.2Inherentinthistestmethodisthelimitationthattheimpuritiesmustbevolatile.Resolutionofsomeoftheindi-vidualimpuritiesmaybelimitedbythecolumnselected.Theuseofseveraldifferenttypesofcolumnsmaybenecessaryiftheultimateinresolutionisrequired.Asinglecolumnwillnormallygivetherequireddegreeofseparation.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecifichazardsstatementsaregiveninSection8.NOTE1—ThereisnosimilarorequivalentISOstandard.2.ReferencedDocuments2.1ASTMStandards:E260PracticeforPackedColumnGasChromatography2E355PracticeforGasChromatographyTermsandRela-tionships23.Terminology3.1Definitions—AlltermsandpracticesusedinthistestmethodareinaccordancewithPracticesE260andE355.4.SummaryofTestMethod4.1Conventionalgaschromatographictechniquesareused.Asmallsampleisinjectedintoagaschromatographiccolumnpackedwithaliquid-coatedsolidsupportorporouspolymerbeads.Passingoverthesupportinastreamofhelium,thesampleisseparatedintoitscomponents,whicharedetectedbyastandardsensingdevice.Thesignalisrecordedtoindicatetherelativeconcentrationofacom...
