1、Designation:D326720Standard Test Method forSeparation and Collection of Particulate and Water-SolubleGaseous Fluorides in the Atmosphere(Filter and ImpingerMethod)1This standard is issued under the fixed designation D3267;the number immediately following the designation indicates the year oforiginal
2、 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 a procedure for separationand collection of part
3、iculate and water-soluble gaseous fluo-rides from the atmosphere on a chemically treated filter and inan impinger.The sampling rate may vary from 30 L min(1.0 ft3/min)to 15 L min(0.5 ft3/min)for longer samplingperiods depending on the atmospheric fluoride concentration.This test method is not intend
4、ed to be applied to gaseousfluorine compounds that are not water-soluble.1.2 There are several limitations of the test method:1.2.1 Although the acid-treated,medium retentive,prefilterhas been shown to allow passage of HF,it restricts passage ofparticulate matter only as small as about 1 m.Thus,smal
5、lerparticulate matter may pass through the filter and be collectedin or pass through the impingers.1.2.2 The maximum sample volume to be taken using thistest method prior to changing the acid-treated prefilter isrecommended as 12 m3.This recommendation is made tominimize any effects due to particula
6、te matter build-up.1.3 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It
7、 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.For specific precautionary statements,see 7.4.3.1.5 This international standard was developed in accor-dance
8、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:
9、2D1071 Test Methods for Volumetric Measurement of Gas-eous Fuel SamplesD1193 Specification for Reagent WaterD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1357 Practice for Planning the Sampling of the AmbientAtmosphereD2009 Practice for Collection by Filtration and Determina-tion
10、 of Mass,Number,and Optical Sizing of AtmosphericParticulates(Withdrawn 1995)3D3268 Test Method for Separation and Collection of Par-ticulate and Gaseous Fluorides in the Atmosphere(So-dium Bicarbonate-Coated Glass Tube and ParticulateFilter Method)D3269 Test Methods for Analysis for Fluoride Conten
11、t ofthe Atmosphere and Plant Tissues(Manual Procedures)(Withdrawn 2010)3D3270 Test Methods for Analysis for Fluoride Content ofthe Atmosphere and Plant Tissues(SemiautomatedMethod)E337 Test Method for Measuring Humidity with a Psy-chrometer(the Measurement of Wet-and Dry-Bulb Tem-peratures)3.Termino
12、logy3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology D1356.4.Summary of Test Method4.1 Air is drawn through an inlet tube(see Practice D1357)and is first passed through an acid-treated prefilter to removeparticulate matter that may contain fluoride and then throug
13、han impinger to remove water-soluble fluorides.1This test method is under the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.03 on AmbientAtmospheres and Source Emissions.Current edition approved Dec.1,2020.Published January 2021.Originallyappro
14、ved in 1973.Last previous edition approved in 2012 as D3267 12.DOI:10.1520/D3267-20.2For 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 o
15、nthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.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 pr
16、inciples 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.14.2 The prefilter and impinger solution are removed fromthe sampling system at the end of the selected sampling periodand taken to an analytical work area and analyzed by either apotentiometric or photometric method(1-4).4See Test Meth-ods D3269 or D3270.5.Significance and U
