ASTM_D_8358_-_21.pdf

Designation:D835821Standard Guide forAssessment and Inclusion of Wall Deposits in the Analysisof Single-Stage Samplers for Airborne Particulate Matter1This standard is issued under the fixed designation D8358;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 Many methods for sampling airborne particulate matterentail aerosol collection on a substrate(typically a filter)housed within a container(or holder),the whole apparatusbeing referred to as an aerosol sampler.In operation,thesampler allows a vacuum(pressure below ambient or room airpressure)to be applied to the rear of the substrate so thatsampled air will pass through the substrate,leaving collectedparticles on the substrate for subsequent analysis.The samplermay also protect the substrate,while the opening(orifice)ofthe container may further play some role in determining whatsize range(s)of particles approach the collection substrate(size-selective sampling).1.2 All particles entering the container orifice are consid-ered part of the sample,unless stated otherwise in the method,but not all particles are necessarily found on the substrate aftersampling(1).2Particles may be deposited on the inner walls ofthe sampler during sampling or may be deposited on the insidewalls of the sampler or on the orifice plug or cap followingtransportation(2).These particles are often loosely referred toas wall deposits.This guide presents background on theimportance of these wall deposits and offers procedures bywhich these deposits can be assessed and included in thesample.1.3 Wall deposits may also occur in multi-stage samplers(for example,cascade impactors),but this guide does not coversuch samplers.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D1356 Terminology Relating to Sampling and Analysis ofAtmospheresD4185 Test Method for Measurement of Metals in Work-place Atmospheres by Flame Atomic Absorption Spectro-photometryD4532 Test Method for Respirable Dust in Workplace At-mospheres Using Cyclone SamplersD6061 Practice for Evaluating the Performance of Respi-rable Aerosol SamplersD6062 Guide for Personal Samplers of Health-RelatedAero-sol FractionsD6552 Practice for Controlling and Characterizing Errors inWeighing Collected AerosolsD6785 Test Method for Determination of Lead in WorkplaceAir Using Flame or Graphite Furnace Atomic AbsorptionSpectrometryD7035 Test Method for Determination of Metals and Met-alloids in Airborne Particulate Matter by InductivelyCoupled Plasma Atomic Emission Spectrometry(ICP-AES)D7439 Test Method for Determination of Elements in Air-borne Particulate Matter by Inductively Coupled Plasma-Mass SpectrometryD7948 Test Method for Measurement of Respirable Crystal-line Silica in Workplace Air by Infrared SpectrometryNOTE1Other standards under the jurisdiction of ASTM CommitteeD22 on Air Quality,including standards that are not the direct responsi-bility of Subcommittee D22.04 on Workplace Air Quality,may also beaffected by this guide and should be considered on a case-by-case basis.1This guide is under the jurisdiction of ASTM Committee D22 on Air Qualityand is the direct responsibility of Subcommittee D22.04 on Workplace Air Quality.Current edition approved Jan.1,2021.Published February 2021.DOI:10.1520/D8358-21.2The boldface numbers in parentheses refer to a list of references at the end ofthis standard.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.12.2 Other Standards:ISO 77