ASTM_D_5466_-_01_2007.pdf

Designation:D546601(Reapproved 2007)Standard Test Method forDetermination of Volatile Organic Chemicals inAtmospheres(Canister Sampling Methodology)1This standard is issued under the fixed designation D5466;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 describes a procedure for sampling andanalysis of volatile organic compounds(VOCs)in ambient,indoor,or workplace atmospheres.The test method is based onthe collection of air samples in stainless steel canisters withspecially treated(passivated)interior surfaces.For sampleanalysis,a portion of the sample is subsequently removed fromthe canister and the collected VOCs are selectively concen-trated by adsorption or condensation onto a trap,subsequentlyreleasedbythermaldesorption,separatedbygaschromatography,and measured by a mass spectrometric detec-tor or other detector(s).This test method describes proceduresfor sampling into canisters to final pressures both above andbelow atmospheric pressure(respectively referred to as pres-surized and subatmospheric pressure sampling).21.2 This test method is applicable to specific VOCs thathave been tested and determined to be stable when stored incanisters.Numerous compounds,many of which are chlori-nated VOCs,have been successfully tested for storage stabilityin pressurized canisters(1-4).3Although not as extensive,documentation is also available demonstrating stability ofVOCs in subatmospheric pressure canisters.While initialstudies were concentrated on non-polar VOCs,information onstorage stability has been extended to many polar compoundsas well(5-7).1.3 The procedure for collecting the sample involves the useof inlet lines and air filters,flow rate regulators for obtainingtime-integrated samples,and in the case of pressurizedsamples,an air pump.Canister samplers have been designed toautomatically start and stop the sample collection process usingelectronically actuated valves and timers(8-10).A weather-proof shelter is required if the sampler is to be used outside.1.4 The organic compounds that have been successfullymeasured at single-digit parts-per-billion by volume(ppbv)levels with this test method are listed in Table 1.This testmethod is applicable to VOC concentrations ranging from thedetection limit to 300 ppbv.Above this concentration,samplesrequire dilution with dry ultra-high-purity nitrogen or air.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 and health practices and determine the applica-bility of regulatory limitations prior to use.Safety practicesshould be part of the users SOP manual.2.Referenced Documents2.1 ASTM Standards:4D1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1357 Practice for Planning the Sampling of the AmbientAtmosphereE260 Practice for Packed Column Gas ChromatographyE355 Practice for Gas Chromatography Terms and Relation-ships2.2 Other Documents:U.S.Environmental Protection Agency,Compendium ofMethods for the Determination to Toxic Organic Com-pounds in Ambient Air,Method TO-14A,EPA 600/R-96/010b53.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology D1356.Other pertinent abbre-viations and symbols are defined within this practice at point ofuse.3.2 Definitions of Terms Specific to This Standard:1This test method is under the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.05 on Indoor Air.Current edition approved April 1,2007.Published June 2007.Originallyapproved in 1993.Last previous edition approved in 2001 as D5466 01.DOI:10.1520/D5466-01R07.2This test method is based on EPA Compendium Method TO-14,“TheDetermination of Volatile Organic Compounds(VOCs)in Ambient Air UsingSUMMA Passivated Canister Sampling and Gas Chromatographic Analysis,”May1988.3The boldface numbers in parentheses refer to the list of references at the end ofthe standard.4For 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.5Available from the U.S.Dept.of Commerce,National Technical InformationService,Port Royal Road,Springfield,VA 22161 or http:/www.cpa.gov/ttn/amtic/airtox.html.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.1 absolute canister pressure Pg+Pa,where Pg=gage pressure in the canister.(kPa,psi)and Pa=barometricpressure.3.2.2 absolute pressurepressure measured with referenceto absolute zero pressure(as opposed to atmospheric pressure)