1、Designation:D5953M16Standard Test Method forDetermination of Non-methane Organic Compounds(NMOC)in Ambient Air Using Cryogenic Preconcentration and DirectFlame Ionization Detection1This standard is issued under the fixed designation D5953M;the number immediately following the designation indicates t
2、he 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 method2presents a procedure for sampling andde
3、termination of non-methane organic compounds(NMOC)inambient,indoor,or workplace atmospheres.1.2 This test method describes the collection of integratedwhole air samples in silanized or other passivated stainlesssteel canisters,and their subsequent laboratory analysis.1.2.1 This test method describes
4、 a procedure for sampling incanisters at final pressures above atmospheric pressure(pres-surized sampling).1.3 This test method employs a cryogenic trapping proce-dure for concentration of the NMOC prior to analysis.1.4 This test method describes the determination of theNMOC by the flame ionization
5、detection(FID),without theuse of gas chromatographic columns and other proceduresnecessary for species separation.1.5 The range of this test method is from 20 to 10 000ppb C(1,2).31.6 This test method has a larger uncertainty for somehalogenated or oxygenated hydrocarbons than for simplehydrocarbons
6、 or aromatic compounds.This is especially true ifthere are high concentrations of chlorocarbons or chlorofluo-rocarbons present.1.7 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for inform
7、a-tion only and are not considered standard.1.8 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
8、 limitations prior to use.2.Referenced Documents2.1 ASTM Standards:4D1193 Specification for Reagent WaterD1356 Terminology Relating to Sampling and Analysis ofAtmospheresD1357 Practice for Planning the Sampling of the AmbientAtmosphereD5466 Test Method for Determination of Volatile OrganicCompounds
9、in Atmospheres(Canister Sampling Method-ology)2.2 Other References:EPAMethod TO-12 Determination of Non-Methane OrganicCompounds(NMOC)in Ambient Air Using CryogenicPre-Concentration and Direct Flame Ionization Detection(PDFID)53.Terminology3.1 DefinitionsFor definitions of terms used in this testmet
10、hod,refer to Terminology D1356.3.2 Definitions of Terms Specific to This Standard:3.2.1 cryogena refrigerant used to obtain very low tem-peratures in analytical system cryogenic traps.3.2.1.1 DiscussionLiquid argon(bp 185.7C at standardpressure)is recommended and may be required for use in someappli
11、cations of this test method.Cryogens with lower boiling1This is under the jurisdiction of ASTM Committee D22 on Air Quality and isthe direct responsibility of Subcommittee D22.03 on Ambient Atmospheres andSource Emissions.Current edition approved Oct.1,2016.Published October 2016.Originallyapproved
12、in 1996.Last previous edition approved in 2009 as D5953M 96(2009).DOI:10.1520/D5953M-16.2This test method is based on EPACompendium Method TO-12:“Determinationof Non-Methane Organic Compounds(NMOC)in Ambient Air Using CryogenicPre-Concentration and Direct Flame Ionization Detection(PDFID),”Compendiu
13、mof Methods for the Determination of Toxic Organic Compounds in Ambient Air,EPA600 4-89-017,U.S.Environmental Protection Agency,Research Triangle Park,NC,March 1990.3The boldface numbers in parentheses refer to the list of references at the end ofthis standard.4For referenced ASTM standards,visit th
14、e 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 United States Environmental ProtectionAgency(EPA),WilliamJefferson Clinton Bldg.,1200 Pen
15、nsylvania Ave.,NW,Washington,DC 20460,http:/www.epa.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 points,such as liquid nitrogen,may be used if the cryogenictrap temperature is actively maintained at 185C to avoid thepotential for t
16、rapping oxygen or methane from air samples.3.2.2 dynamic calibrationcalibration of an analytical sys-tem with pollutant concentrations that are generated in adynamic,flowing system,such as by quantitative,flow-ratedilution of a high-concentration gas standard with zero gas.3.2.3 NMOCnon-methane organic compounds.3.2.3.1 DiscussionTotal non-methane organic compoundsare compounds,excluding methane,measured using a flameionization detector(FID),with vapor pressures above 102kParecovered from canist
