1、Designation:D173998(Reapproved 2017)Standard Test Method forCollection and Measurement of Dustfall(SettleableParticulate Matter)1This standard is issued under the fixed designation D1739;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revisio
2、n,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 covers a procedure for collection ofdustfall and its measurement.This test method is not app
3、ro-priate for determination of the dustfall rate in small areasaffected by specific sources.This test method describes deter-mination of both water-soluble and insoluble particulate mat-ter.1.2 This test method is inappropriate for industrial hygieneuse except where other more specific methods are a
4、lso used.1.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 standard to establish
5、 appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B57 Specification for Copper-Alloy Condenser Tube Plates;Replaced by B 171(Withdrawn 1941)3D1193 Specification for Reagent WaterD1356 Terminolog
6、y Relating to Sampling and Analysis ofAtmospheresE11 Specification for Woven Wire Test Sieve Cloth and TestSievesIEEE/ASTM SI-10 American National Standard for Use ofthe International System of Units(SI):The Modern MetricSystem3.Terminology3.1 DefinitionsFor definitions of terms used in this testmet
7、hod,refer to Terminology D1356.An explanation of units,symbols,and conversion factors may be found in PracticeE380.3.2 Definitions of Terms Specific to This Standard:3.2.1 settleable particulate materialany material com-posed of particles small enough to pass through a 1-mm screen(see Specification
8、E11)and large enough to settle by virtue oftheir weight into the container from the ambient air.4.Summary of Test Method4.1 Containers of a standard size and shape are prepared andsealed in a laboratory and then opened and set up at appropri-ately chosen sites so that particulate matter can settle i
9、nto themfor periods of about 30 days.The containers are then closedand returned to the laboratory.The masses of the water-solubleand-insoluble components of the material collected are deter-mined.The results are reported as grams per square metre per30 days g/(m2 30 d).5.Significance and Use5.1 This
10、 test method has the advantage of extreme simplic-ity.It is a crude and non-specific test method,but it is useful inthe study of long-term trends.It requires very little investmentin equipment and can be carried out without a largetechnically-skilled staff.5.2 This test method is useful for obtainin
11、g samples ofsettleable particulate matter for further chemical analysis(1).46.Interferences6.1 The results from this test method are obtained byweighings.Any material that gets into the container and passesthrough the sieve used in analysis,but which did not settle intothe container after air entrai
12、nment can be considered aninterferent.7.Apparatus7.1 ContainerAn open-topped cylinder not less than 150mm 6 in.in diameter with height not less than twice its1This test method is under the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.03 on Amb
13、ientAtmospheres and Source Emissions.Current edition approved March 1,2017.Published March 2017.Originallyapproved in 1960.Last previous edition approved in 2010 as D1739 98(2010).DOI:10.1520/D1739-98R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Servi
14、ce 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 referenced onwww.astm.org.4The boldface numbers in parentheses refer to the list of references at the en
15、d ofthis test method.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDeve
16、lopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 diameter.Containers should be made of stainless steel orweatherproof plastic.They shall be capable of acceptinglegible,weatherproof,identification markings.A tight-fittinglid is needed for each container.7.2 Stand,for the container,which will hold the top of thecontainer at a height of 2 m above ground.It will also includea wind shield constructed in ac
