ASTM_D_4834_-_03_2014.pdf

Designation:D483403(Reapproved 2014)Standard Test Method forDetection of Lead in Paint by Direct Aspiration AtomicAbsorption Spectroscopy1This standard is issued under the fixed designation D4834;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 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 is intended as a screening test todetermine if the solids in a paint contain more than 0.06%lead.The test described can differentiate between 0.05 and0.06%.Paints giving a result greater than 0.05%should beanalyzed quantitatively for lead using Test Method D3335.This test method provides a more definitive and reliablescreening test than Test Method D3618.1.2 There is no reason to believe that higher levels of leadcould not be determined by this test method provided thatappropriate dilutions and adjustments in specimen size andreagent quantities are made.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 appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1193 Specification for Reagent WaterD2832 Guide for Determining Volatile and Nonvolatile Con-tent of Paint and Related CoatingsD3335 Test Method for Low Concentrations of Lead,Cadmium,and Cobalt in Paint by Atomic AbsorptionSpectroscopyD3618 Test Method for Detection of Lead in Paint and DriedPaint Films3.Summary of Test Method3.1 A weighed quantity of the paint sample is diluted(solvent-reducible paints in methyl isobutyl ketone and water-reducible paints in water)and then aspirated into the burner ofan atomic absorption spectrometer.Lead content of the paint isdetermined from a calibration plot of absorbance versusconcentration,prepared from standard coatings containingknown amounts of lead.4.Significance and Use4.1 Current U.S.regulations restrict the amount of lead thatmay be present in consumer paint products to less than 0.06%based on the total solids.This test method provides a rapidmeans for screening paints to determine compliance with thoseregulations.The test method may be adjusted to meet regula-tions with a different limit on lead content.5.Apparatus5.1 Atomic Absorption Spectrophotometer,consisting of anatomizer and either a single-or a three-slot burner,gas pressureregulating and metering devices for air and acetylene,leadsource lamp with a regulated constant-current supply,a mono-chromator and associated optics,a photosensitive detectorconnected to an electronic amplifier,and a readout device.5.2 Volumetric Flasks,50 mL.6.Reagent and Materials6.1 Purity of ReagentsReagent grade chemicals shall beused in all tests unless otherwise specified.Unless otherwiseindicated,it is intended that all reagents shall conform to thespecifications of the Committee on Analytical Reagents of theAmerican Chemical Society,where such specifications areavailable.3Other grades may be used,provided it is firstascertained that the reagent is of sufficiently high purity topermit its use without lessening the accuracy of the determi-nation.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.Current edition approved July 1,2014.Published July 2014.Originally approvedin 1988.Last previous edition approved in 2008 as D4834 03(2008).DOI:10.1520/D4834-03R14.2For 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.3Reagent Chemicals,American Chemical Society Specifications,AmericanChemical Society,Washington,DC.For suggestions on the testing of reagents notlisted by the American Chemical Society,see Analar Standards for LaboratoryChemicals,BDH Ltd.,Poole,Dorset,U.K.,and the United States Pharmacopeiaand National Formulary,U.S.Pharmacopeial Convention,Inc.(USPC),Rockville,MD.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.2 Purity of WaterUnless otherwise indicated,referencesto water shall be understood to mean reagent water conformingto Type II of Specification D1193.6.3 Methyl Isobutyl Ketone(MIBK),technical grade.6.4 Standard PaintsPrepare at least 3 standard paints byadding accurately weighed quantities of an analytically assayedcompatible lead compound to a solvent-reducible or water-reducible paint that has been an