1、Designation:D714421Standard Practice forCollection of Surface Dust by Micro-vacuum Sampling forSubsequent Determination of Metals and Metalloids1This standard is issued under the fixed designation D7144;the number immediately following the designation indicates the year oforiginal adoption or,in the
2、 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 practice covers the micro-vacuum collection ofsurface dust for subsequent determination
3、of metals andmetalloids.The primary intended application is for samplingfrom soft,rough,or porous surfaces.1.2 Micro-vacuum sampling is carried out using a collectionnozzle attached to a filter holder(sampling cassette)that isconnected to an air sampling pump.1.3 This practice allows for the subsequ
4、ent determination ofmetals and metalloids on a loading basis(mass of element(s)per unit area sampled),or on a concentration basis(mass ofelement(s)per unit mass of sample collected),or both.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in
5、thisstandard.1.5 LimitationsDue to a number of physical factors inher-ent in the micro-vacuum sampling method,analytical resultsfor vacuum dust samples are not likely to reflect the total dustcontained within the sampling area prior to sample collection.Indeed,dust collection will generally be biase
6、d towardssmaller,less dense dust particles.Nevertheless,the use of thisstandard practice will generate data that are consistent andcomparable between operators performing micro-vacuum col-lection at a variety of sampling locations and sites.21.6 This standard does not purport to address all of thesa
7、fety 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.1.7 This international standard was developed in accor-dance w
8、ith internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:3
9、D1356 Terminology Relating to Sampling and Analysis ofAtmospheresD3195 Practice for Rotameter CalibrationD4840 Guide for Sample Chain-of-Custody ProceduresD5438 Practice for Collection of Floor Dust for ChemicalAnalysisD5337 Practice for Flow Rate Adjustment of Personal Sam-pling PumpsD6966 Practice
10、 for Collection of Settled Dust SamplesUsing Wipe Sampling Methods for Subsequent Determi-nation of MetalsD7035 Test Method for Determination of Metals and Met-alloids in Airborne Particulate Matter by InductivelyCoupled Plasma Atomic Emission Spectrometry(ICP-AES)3.Terminology3.1 DefinitionsFor def
11、initions of terms relating to sam-pling and analysis of dust not given here,refer to TerminologyD1356.3.2 Definitions of Terms Specific to This Standard:3.2.1 air sampling pump,na portable pump that is used todraw air through a filter holder/collection nozzle assembly formicro-vacuum collection of s
12、urface dust.An example wouldinclude a personal sampling pump.3.2.2 batch,na group of field or quality control samples,or both,that are collected together in a similar environment andare processed together using the same reagents and equipment.3.2.3 collection nozzle,na piece of flexible plastic tubi
13、ngcut at a 45 angle at the inlet end,and connected at the outletend to the inlet orifice of a filter holder(sampling cassette).1This practice is under the jurisdiction ofASTM Committee D22 on Air Qualityand is the direct responsibility of Subcommittee D22.04 on Workplace Air Quality.Current edition
14、approved May 1,2021.Published May 2021.Originallyapproved in 2005.Last previous edition approved in 2016 as D7144 05a(2016).DOI:10.1520/D7144-21.2Reynolds,S.J.,et al.,“Laboratory Comparison of Vacuum,OSHA,and HUDSampling Methods for Lead in Household Dust,”American Industrial HygieneAssociation Jour
15、nal,Vol 58,1997,pp.439446.3For 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.Copyright ASTM International,100 Barr Ha
16、rbor 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 theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.13.2.4 field blank,na sample that is handled in exactly thesame way that field samples are collected,except that no ai