1、Designation:D326712Standard 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 on a ch
3、emically treated filter and in an impingerof particulate and water-soluble gaseous fluoride in the atmo-sphere.The sampling rate may vary from 30 L/min(1.0ft3/min)to 15 L/min(0.5 ft3/min)for longer sampling periodsdepending on the atmospheric fluoride concentration.This testmethod is not intended to
4、 be applied to gaseous fluorinecompounds that are not water-soluble1.2 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 will restrict passageof particulate matter only as small as about 1 m.Thus,smalle
5、rparticulate 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 particulate
6、 matter build-up.1.3 The values stated in SI units are to be regarded as thestandard.The inch-pound units given in parentheses are forinformation only.1.4 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 st
7、andard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For specific precau-tionary statements,see 7.2 and 7.4.6.2.Referenced Documents2.1 ASTM Standards:2D1071 Test Methods for Volumetric Measurement of Gas-eous Fuel Sampl
8、esD1193 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 of Mass,Number,and Optical Sizing of AtmosphericParticulates(Withdra
9、wn 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 Content ofthe Atmosphere and Plant Tissues(Manual Procedures)(Withdrawn 201
10、0)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.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,r
11、efer to Terminology D1356.4.Summary of Test Method4.1 Air is drawn through an air inlet tube(see PracticeD1357)and is first passed through an acid-treated prefilter toremove particulate matter that may contain fluoride and thenthrough an impinger to remove water-soluble fluorides.1This test method i
12、s 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 April 1,2012.Published May 2012.Originallyapproved in 1973.Last previous edition approved in 2005 as D3267 91(2005)
13、.DOI:10.1520/D3267-12.2For 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.3The last approved version of this historica
14、l standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.2 The prefilter and impinger solution are removed fromthe sampling system at the end of the selected sampling periodand taken to an analytical work
15、area and analyzed by either apotentiometric or photometric method(1-4).4See Test Meth-ods D3269 and D3270.5.Significance and Use5.1 This test method provides a means of separation andcollection of particulate and water soluble gaseous fluoride andprovides samples that are convenient to analyze.6.Int
16、erferences6.1 Particulate metallic salts,such as those of aluminum,iron,calcium,magnesium or rare-earth elements,may reactwith and remove some or all of the water-soluble gaseousfluoride on the prefilter.If interfering quantities of suchparticulate metallic salts are present,the use of Test MethodD3268 is recommended because the acidic fluoride gases arecollected prior to the filter.6.2 Aluminum or certain other metals or phosphates caninterfere with subsequent analyses by photometric or electro
