1、Designation:D3685/D3685M13(Reapproved 2021)Standard Test Methods forSampling and Determination of Particulate Matter in StackGases1This standard is issued under the fixed designation D3685/D3685M;the number immediately following the designation indicates theyear of original adoption or,in the case o
2、f revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods describe procedures to determine themass emission rates of particulate matter and
3、 collected residuein gaseous streams by in-stack test methods(Test MethodA)orout-of-stack test methods(Test Method B).1.2 These test methods are suitable for measuring particu-late matter and collected residue concentrations.1.3 These test methods include a description of equipmentand procedures to
4、be used for obtaining samples from effluentducts and stacks,a description of equipment and procedures forlaboratory analysis,and a description of procedures for calcu-lating results.1.4 These test methods are applicable for sampling particu-late matter and collected residue in wet(Test Method A or B
5、)or dry(Test Method A)streams before and after particulatematter control equipment,and for determination of controldevice particulate matter collection efficiency.1.5 These test methods are also applicable for determiningcompliance with regulations and statutes limiting particulatematter existing in
6、 stack gases when approved by federal orstate agencies.1.6 The particulate matter and collected residue samplescollected by these test methods may be used for subsequentsize and chemical analysis.1.7 These test methods describe the instrumentation,equipment,and operational procedures,including sites
7、election,necessary for sampling and determination of particu-late mass emissions.These test methods also include proce-dures for collection and gravimetric determination of residuescollected in an impinger-condenser train.The sampling andanalysis of particulate matter may be performed independentlyo
8、r simultaneously with the determination of collected residue.1.8 These test methods provide for the use of optional filterdesigns and filter material as necessary to accommodate thewide range of particulate matter loadings to which the testmethods are applicable.1.9 Stack temperatures limitation for
9、 Test Method A isapproximately 400C(752F)and for Test Method B is 815C(1500F).1.10 A known limitation of these test methods concerns theuse of collected residue data.Since some collected residues canbe formed in the sample train by chemical reaction in additionto condensation,these data should not b
10、e used without priorcharacterization(see 4.4.1).1.10.1 A second limitation concerns the use of the testmethods for sampling gas streams containing fluoride,orammonia or calcium compounds in the presence of sulfurdioxide and other reactive species having the potential to reactwithin the sample train.
11、1.10.2 A suspected but unverified limitation of these testmethods concerns the possible vaporization and loss of col-lected particulate organic matter during a sampling run.1.11 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard within the text.Theinch-
12、pound units are shown in parentheses.The values statedin each system are not exact equivalents;therefore each systemshall be used independently of the other.Combining valuesfrom the two systems may result in nonconformance to thisstandard.1.12 This standard does not purport to address all of thesafe
13、ty concerns,if any,associated with its use.It 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.1.13 This international standard was developed in accor-dance wi
14、th internationally recognized principles on standard-ization established in the Decision on Principles for the1This 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 edi
15、tion approved Sept.1,2021.Published October 2021.Originallyapproved in 1978.Last previous edition approved in 2013 as D3685/D3685M 13.DOI:10.1520/D3685_D3685M-13R21.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard
16、 was developed in accordance with internationally recognized principles 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.1Development of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1071 Test Methods for
