1、Designation:D326691(Reapproved 2011)Standard Test Method forAutomated Separation and Collection of Particulate andAcidic Gaseous Fluoride in the Atmosphere(Double PaperTape Sampler Method)1This standard is issued under the fixed designation D3266;the number immediately following the designation indi
2、cates 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.This standard has been approved for use by agencies of the U
3、.S.Department of Defense.1.Scope1.1 This test method describes the automatic separation andcollection on chemically treated paper tapes of particulate andgaseous forms of acidic fluorides in the atmosphere by meansof a double paper tape sampler.The sampler may be pro-grammed to collect and store ind
4、ividual air samples obtainedover time periods from several minutes to 3 h.A 30.5-m(100-ft)tape will allow unattended operation for the automaticcollection of up to 600 samples.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3
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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents
6、2.1 ASTM Standards: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 AmbientAtmosphereD3195 Practice for Rotameter CalibrationD32
7、68 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Method)D3269 Test Methods for Analysis for Fluoride Content ofthe Atmosphere and Plant Tissues(Manual Procedures)(Withdrawn 2010)3D3270 Tes
8、t Methods for Analysis for Fluoride Content ofthe Atmosphere and Plant Tissues(SemiautomatedMethod)D3609 Practice for Calibration Techniques Using Perme-ation TubesD3614 Guide for Laboratories Engaged in Sampling andAnalysis of Atmospheres and Emissions3.Terminology3.1 DefinitionsFor definitions of
9、terms used in this testmethod,refer 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 prefilterpaper tape to remove particulate matter which may containfluoride and then through an alkali-treated pape
10、r tape toremove acidic fluoride gases.4.2 The exhaust air is filtered through soda lime-glass wool,and the cleaned air is used to pressurize the front compartmentto prevent fluoride contamination of the paper tapes from theambient air.4.3 Automatically,at the end of the preset sampling period,the va
11、cuum pump is turned off,the tapes are indexed,and afterindexing the vacuum pump is turned on.Indexing results in a“dead time”of several seconds.4.4 The paper tapes are removed from the sampler after aselected period of operation and taken to an analytical work1This test method is under the jurisdict
12、ion of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.03 on AmbientAtmospheres and Source Emissions.Current edition approved Oct.1,2011.Published October 2011.Originallyapproved in 1973.Last previous edition approved in 2005 as D3266 91(2005).DOI:10.1520/D3266-
13、91R11.2For 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 historical standard is re
14、ferenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 area where the individual sample spots are cut out,treated todissolve the fluoride,and analyzed by potentiometric or pho-tometric methods.4,5,65.Significance and Use5
15、.1 This test method provides a means of automaticallyseparating and collecting atmospheric particulate and acidicgaseous fluoride samples.5.2 Since the samples are collected on dry tapes,thesamples are in a form which allows elution of the fluoridecontent with a small volume of eluent.Consequently,t
16、hemethod allows analyses of air samples taken for a time periodas short as several minutes.6.Interferences6.1 Particulate metallic salts,such as those of aluminum,iron,calcium,magnesium or rare-earth elements,may reactwith and remove some or all of the acidic gaseous fluoride onthe prefilter.If interfering quantities of such particulate metal-lic salts are present,the use of Test Methods D3268 isrecommended because the acidic fluoride gases are collectedprior to the filter.6.2 Acid aerosols or g
