1、Designation:D655206(Reapproved 2021)Standard Practice forControlling and Characterizing Errors in Weighing CollectedAerosols1This standard is issued under the fixed designation D6552;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,th
2、e 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 Assessment of airborne aerosol hazards in the occupa-tional setting entails sampling onto a collection mediumfoll
3、owed by analysis of the collected material.The result isgenerally an estimated concentration of a possibly hazardousmaterial in the air.The uncertainty in such estimates dependson several factors,one of which relates to the specific type ofanalysis employed.The most commonly applied method foranalys
4、is of aerosols is the weighing of the sampled material.Gravimetric analysis,though apparently simple,is subject toerrors from instability in the mass of the sampling medium andother elements that must be weighed.An example is providedby aerosol samplers designed to collect particles so as to agreewi
5、th the inhalable aerosol sampling convention(see ISO 7708,Guide D6062,and EN 481).For some sampler types,filter andcassette are weighed together to make estimates.Therefore,ifthe cassette,for example,absorbs or loses water between theweighings required for a concentration estimation,then errorsmay a
6、rise.This practice covers such potential errors andprovides solutions for their minimization.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns,if any,assoc
7、iated 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.1.4 This international standard was developed in accor-dance with internationally recogn
8、ized 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:2D1356 Terminology Relating
9、 to Sampling and Analysis ofAtmospheresD4096 Test Method for Determination of Total SuspendedParticulate Matter in theAtmosphere(HighVolume Sam-pler Method)D4532 Test Method for Respirable Dust in Workplace At-mospheres Using Cyclone SamplersD6062 Guide for Personal Samplers of Health-RelatedAero-so
10、l Fractions2.2 International Standards:3EN 481 Workplace Atmospheres Size Fraction Defini-tions for Measurement of Airborne Particles in the Work-placeEN 13205 Workplace Atmospheres Assessment of Per-formance of Instruments for Measurement of AirborneParticle Concentrations2.3 ISO Standards:4ISO 770
11、8 Air quality Particle size fraction definitions forhealth-related samplingISO 20581 Workplace atmospheres General requirementsfor performance of procedures for the measurement ofchemical agentsISO 20988 Air quality Guidelines for estimating mea-surement uncertaintyISO GUM Guide to the Expression of
12、 Uncertainty in Mea-surement(1998)3.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this practice,refer toTerminology D1356.3.2 Definitions of Terms Specific to This Standard:1This practice is under the jurisdiction ofASTM Committee D22 on Air Qualityand is the direct responsibilit
13、y of Subcommittee D22.04 on Workplace Air Quality.Current edition approved Sept.1,2021.Published October 2021.Originallyapproved in 2000.Last previous edition approved in 2016 as D6552 06(2016).DOI:10.1520/D6552-06R21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM
14、Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from European Committee for Standardization(CEN),AvenueMarnix 17,B-1000,Brussels,Belgium,http:/www.cen.eu.4Available from American Nation
15、al Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.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
16、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.13.2.1 blank substrate,na collection medium or substratecoming from the same batch as the sampling medium,butunexposed.3.2.2 equilibration time,nFor the purposes of thispractice,a time constant(seconds)characterizing an approxi-mate exponentially damped approach of the mass of an aerosol
