1、Designation:D704904(Reapproved 2010)Standard Test Method forMetal Removal Fluid Aerosol in Workplace Atmospheres1This standard is issued under the fixed designation D7049;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of la
2、st 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 the determina-tion of both total collected particulate matter and extractablemass met
3、al removal fluid aerosol concentrations in the range of0.05 to 5 mg/m3in workplace atmospheres.1.2 This test method describes a standardized means ofcollecting worker exposure information that can be comparedto existing exposure databases,using a test method that is alsomore specific to metal remova
4、l fluids.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:2D1356 Terminology Relating to Sampling and Analysis ofAtmospheresD3195 Practice for Rotameter CalibrationD3670 Guide for Determination of Precis
6、ion and Bias ofMethods of Committee D22D4532 Test Method for Respirable Dust in Workplace At-mospheres Using Cyclone SamplersD5337 Practice for Flow Rate Adjustment of Personal Sam-pling PumpsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 Governme
7、nt Standards:29 CFR 1910.1000 Air Contaminants329 CFR 1910.1450 Occupational Exposure to HazardousChemicals in Laboratories32.3 NIOSH Document:Method 0500 NIOSH Manual of Analytical Methods(NMAM),4th Ed43.Terminology3.1 For definitions of terms relating to this test method,referto Terminology D1356.
8、3.2 Definitions of Terms Specific to This Standard:3.2.1 breathing zone,nthe workers breathing zone con-sists of a hemisphere 300-mm radius extending in front of theface,centered on the midpoint of a line joining the ears;thebase of the hemisphere is a plane through this line,the top ofthe head and
9、the larynx.3.2.2 extractable mass,nthe material removed by liquidextraction of the filter using a mixed-polarity solvent mixture.This mass is an approximation of the metal removal fluidportion of the workplace aerosol.3.2.3 filter set,na group of filters from the same produc-tion lot that are weighe
10、d and assembled into the filter cassettesat one time.The filter set may be used for sampling on multipledays with the appropriate field blanks being submitted for eachsampling day.3.2.4 metal removal fluids,nthe subset of metal workingfluids that are used for wet machining or grinding to producethe
11、finished part.Metal removal fluids are often characterizedas straight,soluble,semisynthetic,and synthetic.3.2.4.1 DiscussionMetal removal fluids addressed by thispractice include straight or neat oils,not intended for furtherdilution with water,and water-miscible soluble oils,semisynthetics,and synt
12、hetics,which are intended to be dilutedwith water before use.Metal removal fluids become contami-nated during use in the workplace with a variety of workplacesubstances including,but not limited to,abrasive particles,tramp oils,cleaners,dirt,metal fines and shavings,dissolved1This test method is und
13、er the jurisdiction of ASTM Committee D22 on AirQuality and is the direct responsibility of Subcommittee D22.04 on Workplace AirQuality.Current edition approved April 1,2010.Published June 2010.Originallyapproved in 2004.Last previous edition approved in 2004 as D7049-04.DOI:10.1520/D7049-04R10.2For
14、 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.3Available from U.S.Government Printing Office Superintendent of Docum
15、ents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401.4Available from National Institute for Occupational Safety and Health,4676Columbia Pkwy.,Cincinnati,OH 45226.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 metal and hard water
16、salts,bacteria,fungi,microbiologicaldecay products,and waste.These contaminants can causechanges in the lubricity and cooling ability of the metalremoval fluid as well as have the potential to adversely affectthe health and welfare of employees in contact with thecontaminated metal removal fluid.4.Summary of Test Method4.1 Workplace air is drawn into a 37-mm filter cassettecontaining a tared polytetrafluoroethylene(PTFE)filter for ameasured period of time.The total particulate matter concen-trat
