ASTMD2009b5W075953000b38778W4([ThDesignation:D2009-65(Reapproved1990)AnAmericanNationalStandarc.StandardPracticeforCollectionbyFiltrationandDeterminationofMass,Number,andOpticalSizingofAtmosphericParticulates‘ThisstandardisissuedunderthefixeddesignationD2009;thenumberimmediatelyfollowingthedesignationindicatestheyearof.originaladoptionor,inthecaseofrevision.theparoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(3indicatesaneditorialchangesincethelastrevisionorreapproval.TliispraciiceItasbeenapproredloritsebyageticiesoftheDepartttienrofDeJetiseatidforlisiitig¡ti¡lieDoDItidexofSpecijicniiotisatidSiatidards.1.Scope1.1Thisrecommendedpracticecoversthesamplecollec-tionofparticulatematterfromanatmospherebyfiltrationandformeasurementofmassamount,particlesize,andparticlesizedistributionofthecollectedmaterial.Variationsintherecommendedpracticepermitsamplingtomeetanumberofwidelydifferentassayneeds.Althoughespeciallyapplicabletocollectionofsolidparticles,thefiltermethodmaybeusedalsotocollectliquidparticlesifdropletsizeneednotbedetermined.2.ReferencedDocuments2.1ASTMStandards:D1356DefinitionsofTermsRelatingtoAtmosphericD1357PracticeforPlanningtheSamplingoftheAmbientD1704TestMethodforParticulateMatterintheAtmos-SamplingandAnalysis2Atmosphere’phere(OpticalDensityofFilteredDeposit)’3.Definitionspractice,refertoDefinitionsD1356.3.1Fordefinitionsoftermsusedinthisrecommended4.SummaryofRecommendedPractice4.1Ameasuredandrepresentativesampleoftheatmos-phereunderinvestigationisdrawnthroughafiltermediumselectedtoarrestandpermitmeasurementoftheparticlesthataretobestudied.Formostpurposes,theexposedfiltermediumisremovedfromthesamplingdeviceandappro-priateexaminationmethodsthenappliedtothecollectedmatter.Thisrecommendedpracticeprovidesfordetermina-tionofmassloading,particleconcentration,particlesizeandsizedistribution,andparticleinspection.Chemicalcomposi-tion,radioactivity,andothercharacteristicsoftheparticlesmaybedeterminedbyadditionalmethodsnot...
