1、Designation:D459710(Reapproved 2021)Standard Practice forSampling Workplace Atmospheres to Collect Gases orVapors with Solid Sorbent Diffusive Samplers1This standard is issued under the fixed designation D4597;the number immediately following the designation indicates the year oforiginal adoption or
2、,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 practice covers the sampling of workplace atmo-spheres for the presence of certai
3、n gases or vapors by means ofdiffusion across a specified quiescent region and subsequentsorption on a solid sorbent(1).21.2 A list of organic compounds which are applicable tosolid sorbent sampling where the sorbent is contained in a bedthrough which air is passed is given in Annex A1 of PracticeD3
4、686.Diffusive samplers may be applicable to a similarrange of compounds but this must be confirmed by reference tothe individual sampler manufacturers literature.1.3 The valid use of diffusive samplers depends on theexistence of actual laboratory or field validation,or both.Guidance on validation ca
5、n be obtained from published proto-cols(2-6).This practice is not designed to cover theverification,validation,or specific test procedures used toassess the accuracy or precision of diffusive samplers.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are i
6、ncluded 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 limit
7、ations 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 T
8、echnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3D1356 Terminology Relating to Sampling and Analysis ofAtmospheresD3686 Practice for Sampling Atmospheres to Collect Or-ganic Compound Vapors(Activated Charcoal Tube Ad-sorption Method)D3687 Test Method for Analysis of
9、Organic CompoundVapors Collected by the Activated Charcoal Tube Adsorp-tion MethodD6306 Guide for Placement and Use of Diffusive Samplersfor Gaseous Pollutants in Indoor Air2.2 Other Document:4Title 29CFR 1910.1000 Subpart Z,Occupational Health andSafety Standard3.Terminology3.1 DefinitionsFor defin
10、itions of terms used in thispractice,refer to Terminology D1356.3.2 Definitions of Terms Specific to This Standard:3.2.1 diffusion,nthe movement of gas or vapor moleculesfrom a region of high concentration to a region of lowconcentration as described by Ficks first law(8.1).3.2.2 diffusive sampler,n
11、assembly used for sampling gasor vapor molecules from the atmosphere.3.2.3 sampling rate,nthe ratio of mass of a given com-pound collected by a diffusive sampler per unit time ofexposure to the concentration of that compound in the atmo-sphere being sampled.3.2.3.1 DiscussionThe sampling rate is som
12、etimes re-ferred to as the uptake rate.Units are ng(or mg)/mg/m3/min(orh),which are dimensionally equivalent to a volume flow-rate(for example cm3/min).1This practice is under the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.04 on Workplace Ai
13、rQuality.Current edition approved March 1,2021.Published March 2021.Originallyapproved in 1987.Last previous edition approved in 2015 as D4597 10(2015).DOI:10.1520/D4597-10R21.2The boldface numbers in parentheses refer to a list of references at the end ofthis standard.3For referenced ASTM standards
14、,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.4Code of Federal Regulations available from U.S.Government Printing Office,Superintendent of Doc
15、uments,732 N.Capitol St.,NW,Washington,DC 20401-0001,http:/www.access.gpo.gov.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 standardizat
16、ion 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.14.Summary of Practice4.1 Molecules(gases and vapors)are sampled from theatmosphere by a diffusive sampler.During the samplingprocess,the molecules diffuse from the environment adjacentto the sampler through a region of defined geometric structureand into a region containing the sorbent medium.The t
