ASTM D4834-2003 Standard Test Method for Detection of Lead in Paint by Direct Aspiration Atomic Absorption Spectroscopy《用直接吸气原子吸收光谱法检测涂料中铅的标准试验方法》.pdf
《ASTM D4834-2003 Standard Test Method for Detection of Lead in Paint by Direct Aspiration Atomic Absorption Spectroscopy《用直接吸气原子吸收光谱法检测涂料中铅的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D4834-2003 Standard Test Method for Detection of Lead in Paint by Direct Aspiration Atomic Absorption Spectroscopy《用直接吸气原子吸收光谱法检测涂料中铅的标准试验方法》.pdf(3页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 4834 03Standard Test Method forDetection of Lead in Paint by Direct Aspiration AtomicAbsorption Spectroscopy1This standard is issued under the fixed designation D 4834; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,
2、 the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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
3、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 D 3335.This test method provides a more definitive and reliablescreening test than Test Method D 3618.1.2 There is no reason
4、 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 as thestandard. The values given in parentheses are for informatio
5、nonly.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. Refere
6、nced Documents2.1 ASTM Standards:2D 1193 Specification for Reagent WaterD 2832 Guide for Determining Volatile and NonvolatileContent of Paint and Related CoatingsD 3335 Test Method for Low Concentrations of Lead,Cadmium, and Cobalt in Paint by Atomic AbsorptionSpectroscopyD 3618 Test Method for Dete
7、ction of Lead in Paint andDried Paint 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 th
8、e 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 th
9、e 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 eit
10、her 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 Volumetri
11、c Flasks,50mL.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 Soc
12、iety, where such specifications areavailable.3Other grades may be used, provided it is first1This 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 Paint
13、s and Paint Materials.Current edition approved Dec. 1, 2003. Published January 2004. Originallyapproved in 1988. Last previous edition approved in 1988 as D 4834 88 (1998).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For An
14、nual 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
15、, 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.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, Unite
16、d States.ascertained that the reagent is of sufficiently high purity topermit its use without lessening the accuracy of the determi-nation.6.2 Purity of WaterUnless otherwise indicated, referencesto water shall be understood to mean reagent water conformingto Type II of Specification D 1193.6.3 Meth
17、yl 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 analyzed by Test Method D 3335and shown to contain
18、less than 10 ppm of lead. Determine thenonvolatile content of the base paint and choose quantities ofthe lead compound so that the lead concentrations of thestandard paints will be approximately 300, 600, and 900 g/gbased on the nonvolatile content.7. Calibration and Standardization7.1 Prepare at le
19、ast three solvent-reducible or water-reducible standard paint specimens (see 6.4) that bracket theexpected lead concentration in the sample to be tested. Fol-lowing the procedure in 8.2 dilute the standards for aspiration.7.2 Operational instructions for atomic absorption spectro-photometers vary wi
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