1、Designation:D543811Standard Practice forCollection of Floor Dust for Chemical Analysis1This standard is issued under the fixed designation D5438;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 pa
2、rentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers a procedure for the collection of asample of dust from carpets and bare floors that can beanalyzed for lead,pesticides,or other ch
3、emical compounds andelements.1.2 This practice is applicable to a variety of carpeted andbare floor surfaces.It has been tested for level loop and plushpile carpets and bare wood floors,specifically.1.3 This practice is not intended for the collection andevaluation of dust for the presence of asbest
4、os fibers.1.4 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 establis
5、h appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D422 Test Method for Particle-Size Analysis of SoilsD1356 Terminology Relating to Sampling and Analysis ofAtmospheresE1 Specification for ASTM
6、Liquid-in-Glass ThermometersE337 Test Method for Measuring Humidity with a Psy-chrometer(the Measurement of Wet-and Dry-Bulb Tem-peratures)E1137/E1137M Specification for Industrial Platinum Resis-tance ThermometersE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision L
7、iquidsF608 Test Method for Evaluation of Carpet Embedded DirtRemovalEffectivenessofHousehold/CommercialVacuum Cleaners3.Terminology3.1 DefinitionsFor definitions of terms used in thispractice,refer to Terminology D1356.3.1.1 carpet-embedded dustsoil and other particulatematter,approximately 5-m equi
8、valent aerodynamic diameterand larger,embedded in carpet pile and normally removable byhousehold vacuum cleaners.3.1.2 surface dustsoil and other particulate matter,ap-proximately 5-m equivalent aerodynamic diameter and larger,adhering to floor surfaces and normally removable by house-hold vacuum cl
9、eaners.4.Summary of Practice4.1 The sampling method described in this practice is takenfrom work published in Roberts,et al(1-3),3and Stamper,et al(4).4.2 Particulate matter is withdrawn from the carpet or barefloor by means of vacuum-induced suction which drawsthrough a sampling nozzle at a specifi
10、c velocity and flow rate,and the particles are separated mechanically by a cyclone.Thecyclone is designed to efficiently separate and collect particlesapproximately 5-m mean aerodynamic diameter and larger.However,much smaller particles are also collected at unknownefficiencies.The sampling system a
11、llows for height,air flow,and suction adjustments to reproduce systematically a specificair velocity for the removal of particulate matter from carpetedand bare floor surfaces,so that these sampling conditions canbe repeated.NOTE1Side-by-side comparison of the HVS3 and a conventionalupright vacuum c
12、leaner revealed that both collected particles down to atleast 0.2 m and that the HVS3 was more efficient at collecting particlessmaller than 20 m than conventional vacuum cleaners(5).If desired,afine-particle filter may be added downstream of the cyclone to collect99.9%of particles above 0.2 m aerod
13、ynamic mean diameter.4.3 The particulate matter in the air stream is collected in acatch bottle attached to the bottom of the collection cyclone.1This practice is under the jurisdiction ofASTM Committee D22 on Air Qualityand is the direct responsibility of Subcommittee D22.05 on Indoor Air.Current e
14、dition approved Aug.15,2011.Published August 2011.Originallyapproved in 1993.Last previous edition approved in 2005 as D5438 05.DOI:10.1520/D5438-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards
15、volume information,refer to the standards Document Summary page onthe ASTM website.3The boldface numbers in parentheses refer to the list of references at the end ofthis standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 This catch
16、bottle shall be capped for storage of the sample andtransported to the laboratory for analysis.5.Significance and Use5.1 This practice may be used to collect dust from carpetedor bare floor surfaces for gravimetric or chemical analysis.Thecollected sample is substantially unmodified by the samplingprocedure.5.2 This practice provides for a reproducible dust removalrate from level loop and plush carpets,as well as bare floors.Ithas the ability to achieve relatively constant removal efficiencyat d
