Designation:D3267−12StandardTestMethodforSeparationandCollectionofParticulateandWater-SolubleGaseousFluoridesintheAtmosphere(FilterandImpingerMethod)1ThisstandardisissuedunderthefixeddesignationD3267;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodprovidesaprocedureforseparationandcollectiononachemicallytreatedfilterandinanimpingerofparticulateandwater-solublegaseousfluorideintheatmo-sphere.Thesamplingratemayvaryfrom30L/min(1.0ft3/min)to15L/min(0.5ft3/min)forlongersamplingperiodsdependingontheatmosphericfluorideconcentration.Thistestmethodisnotintendedtobeappliedtogaseousfluorinecompoundsthatarenotwater-soluble1.2Thereareseverallimitationsofthetestmethod:1.2.1Althoughtheacid-treated,mediumretentive,prefilterhasbeenshowntoallowpassageofHF,itwillrestrictpassageofparticulatematteronlyassmallasabout1µm.Thus,smallerparticulatemattermaypassthroughthefilterandbecollectedinorpassthroughtheimpingers.1.2.2Themaximumsamplevolumetobetakenusingthistestmethodpriortochangingtheacid-treatedprefilterisrecommendedas12m3.Thisrecommendationismadetominimizeanyeffectsduetoparticulatematterbuild-up.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecificprecau-tionarystatements,see7.2and7.4.6.2.ReferencedDocuments2.1ASTMStandards:2D1071TestMethodsforVolumetricMeasurementofGas-eousFuelSamplesD1193SpecificationforReagentWaterD1356TerminologyRelatingtoSamplingandAnalysisofAtmospheresD1357PracticeforPlanningtheSamplingoftheAmbientAtmosphereD2009Practicef...
