Designation:D4185−06(Reapproved2011)StandardPracticeforMeasurementofMetalsinWorkplaceAtmospheresbyFlameAtomicAbsorptionSpectrophotometry1ThisstandardisissuedunderthefixeddesignationD4185;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoversthecollection,dissolution,anddeterminationoftracemetalsinworkplaceatmospheres,byflameatomicabsorptionspectrophotometry.1.2Thesensitivity,detectionlimit,andoptimumworkingconcentrationfor23metalsaregiveninTable1.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.(SpecificsafetyprecautionarystatementsaregiveninSection9.)2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD1356TerminologyRelatingtoSamplingandAnalysisofAtmospheresD1357PracticeforPlanningtheSamplingoftheAmbientAtmosphereD3195PracticeforRotameterCalibrationD5337PracticeforFlowRateAdjustmentofPersonalSam-plingPumpsD7035TestMethodforDeterminationofMetalsandMet-alloidsinAirborneParticulateMatterbyInductivelyCoupledPlasmaAtomicEmissionSpectrometry(ICP-AES)3.Terminology3.1Definitions—Fordefinitionsoftermsusedinthispractice,refertoTerminologyD1356.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1blanksignal—thatsignalwhichresultsfromalladdedreagentsandacleanmembranefilterpreparedandanalyzedexactlyinthesamewayasthesamples.3.2.2instrumentaldetectionlimit—thatconcentrationofagivenelementwhichproducesasignalthreetimesthestandarddeviationofthereagentblanksignal.3.2.3workingrangeforananalyticalprecisionbetterthan3%—therangeofsampleconcentrationsthatwillabsorb10to70%oftheincidentradiation(0.05to0.52absorbanceunits).NOTE1—Valuesforinstrument...
