Designation:D3973−85(Reapproved2011)StandardTestMethodforLow-MolecularWeightHalogenatedHydrocarbonsinWater1ThisstandardisissuedunderthefixeddesignationD3973;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoverstheanalysisofdrinkingwater.Itisalsoapplicabletomanyenvironmentalandwastewaterswhenadequatevalidationisincluded.1.2Thistestmethodcoversthedeterminationofhalomethanes,haloethanes,andsomerelatedextractableor-ganohalidesamenabletogaschromatographicmeasurement.Theapplicableconcentrationrangefortrihalomethanesisfrom1to200µg/L.Detectionlimitsdependonthecompound,matrix,andonthecharacteristicsofthegaschromatographicsystem.1.3Forcompoundsnotspecificallyincludedintheprecisionandbiassectiontheanalystshouldvalidatethetestmethodbycollectingprecisionandbiasdataonactualsamples.1.4Confirmationofcomponentidentitiesisobtainedbyobservingretentiontimesusinggaschromatographiccolumnsofdifferentpolarities.Whenconcentrationsaresufficientlyhigh(>50µg/L)confirmationwithhalogenspecificdetectorsorgaschromatography/massspectrometry(GC/MS)maybeused.Confirmationofpurgeablecompoundsatlevelsdownto1µg/LcanbeobtainedusingTestMethodD3871withGC/MSdetection.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregiveninSection8.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD3871TestMethodforPurgeableOrganicCompoundsinWaterUsingHeadspaceSamplingE355PracticeforGasChromatographyTermsandRela...
