ASTM_D_4532_-_15.pdf

Designation:D453215Standard Test Method forRespirable Dust in Workplace Atmospheres Using CycloneSamplers1This standard is issued under the fixed designation D4532;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 This test method provides details for the determinationof respirable dust concentration defined in terms of interna-tional convention in a range from 0.5 to 10 mg/m3inworkplace atmospheres.Specifics are given for sampling andanalysis using any one of a number of commercially availablecyclone samplers.1.2 The limitations on the test method are a minimumweight of 0.1 mg of dust on the filter,and a maximum loadingof 0.3 mg/m2on the filter.The test method may be used athigher loadings if the flow rate can be maintained constant.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This test method contains notes that are explanatory andare not part of the mandatory requirements of the method.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 consult andestablish appropriate safety and health practices and deter-mine the applicability of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1356 Terminology Relating to Sampling and Analysis ofAtmospheresD3195 Practice for Rotameter CalibrationD5337 Practice for Flow Rate Adjustment of Personal Sam-pling PumpsD6062 Guide for Personal Samplers of Health-RelatedAero-sol FractionsD6552 Practice for Controlling and Characterizing Errors inWeighing Collected AerosolsD7440 Practice for Characterizing Uncertainty in Air Qual-ity MeasurementsE1 Specification for ASTM Liquid-in-Glass ThermometersE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids2.2 Other International Standards:3ISO GUM Guide to the Expression of Uncertainty inMeasurement,ISO Guide 98ISO 7708 Air QualityParticle Size Fraction Definitionsfor Health-Related SamplingISO 13137 Workplace Atmospheres Pumps for PersonalSampling of Chemical and Biological Agents Require-ments and Test MethodsISO 15767 Workplace AtmospheresControlling and Char-acterizing Errors in Weighing Collected AerosolEN 481 Workplace AtmospheresSize Fraction Definitionsfor the Measurement of Airborne Particles in the Work-placeEN 13205 Workplace AtmospheresAssessment of Perfor-mance of Instruments for Measurement of Airborne Par-ticle Concentrations3.Terminology3.1 Definitions of Terms Specific to This Standard(otherwise,consult Terminology D1356):3.1.1 respirable conventiontarget specification for sam-pling instruments when the respirable fraction is the fraction ofinterest.3.1.2 respirable fractionmass fraction of total airborneparticles which penetrate to the unciliated airways.3.1.3respirable sampleraerosol sampler that is used tocollect the respirable fraction of airborne particles from thesurrounding air.1This test method is under the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.04 on Workplace AirQuality.Current edition approved Oct.1,2015.Published October 2015.Originallyapproved in 1985.Last previous edition approved in 2010 as D4532 10.DOI:10.1520/D4532-15.2For 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.3Available from American National 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 States1 3.1.3.1 DiscussionFig.1 shows the collection efficiencyof an idealized sampler following the internationally-harmonized sampling conventions of ISO 7708,EN 481,Guide D6062,and Ref.(1).4NOTE1The definition of the respirable fraction is a compromisebetween previous definitions,available samplers,and the fraction of dustthat penetrates to(rather than deposits in)the alveolar region of the lung.Local legal definitions may differ from the definition adopted in this testmethod.3.2 For the terms and definitions related to characterizinguncertainty,see ISO GUM and Practice D7440.4.Summary of Test Method4.1 Air is drawn through a cyclone or equivalent samplerfollowed by a tared filter,which is then re-weighed to deter-mine the mass of respirable dust.The air flow rate and time ofsampling provide the volume from which the dust mass wassampled.A time-weighted average respirable dust concentra-tion is calculated by dividing the mass by the total air volume.NOTE2Samplers alterna