Designation:D8208−19StandardPracticeforCollectionofNon-FibrousNanoparticlesUsingaNanoparticleRespiratoryDeposition(NRD)Sampler1ThisstandardisissuedunderthefixeddesignationD8208;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticedescribesspecifiedapparatusandproce-duresforcollectionofnon-fibrousairbornemetalnanoparticlesgeneratedduringworkactivities.1.2Nanoparticlerespiratorydeposition(NRD)samplersaredesignedtofollowananoparticulatematter(NPM)depositioncurvebasedontheInternationalCommissiononRadiologicalProtection(ICRP)modelfordepositionofparticlessmallerthan300nm(theminimumdepositionforsubmicrometreparticles)whileremovingthelargerparticles(1).21.3Thispracticeisapplicabletopersonalandareasamplingduringworkprocessesandsituationswheremetalnanopar-ticlesmaybegenerated(forexample,welding,smelting,shootingranges).1.4Thispracticeisintendedforusebyprofessionalsexpe-riencedintheuseofdevicesforoccupationalairsampling(suchascyclonesamplers).1.5Thispracticeisnotapplicabletothesamplingoffibrousnanoparticlessuchascarbonnanotubes.1.6Detailedoperatinginstructionsarenotprovidedowingtodifferencesamongvariousmakesandmodelsofsuitabledevicesandinstruments.Theuserisexpectedtofollowspecificinstructionsprovidedbythemanufacturersofparticu-laritemsofequipment.Thispracticedoesnotaddresscom-parativeaccuracyofdifferentdevicesnortheprecisionbe-tweeninstrumentsofthesamemakeandmodel.1.7Thispracticecontainsnotesthatareexplanatoryandarenotpartofthemandatoryrequirementsofthemethod.1.8ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.9Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpractice...
