ASTM_F_2980_-_13.pdf

Designation:F298013Standard Test Method forAnalysis of Heavy Metals in Glass by Field Portable X-RayFluorescence(XRF)1This standard is issued under the fixed designation F2980;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 covers field portable X-ray fluores-cence(XRF)spectrometric procedures for analyses of arsenicand lead in glass compositions using field portable energydispersive XRF spectrometers.1.2 The mass fraction range of arsenic within which this testmethod is quantitative is given in Table 1.Scope limits weredetermined from the interlaboratory study results using theapproach given in Practice E1601.1.3 The mass fraction range for which lead was tested isgiven in Table 1.However,lead results cannot be consideredquantitative on the basis of single-sample results because theprecision performance is not good enough to allow laboratoriesto compare results in a quantitative manner.NOTE1The performance of this test method was evaluated usingresults based on single-sample determinations from specimens composedof glass beads.One laboratory has determined that performance can besignificantly improved by basing reported results on the mean of deter-minations from multiple samples to overcome inherent heterogeneity ofelements in glass beads,especially the element lead.Additional informa-tion is provided in Section 17 on Precision and Bias.1.3.1 To obtain quantitative performance,lead results mustconsist of the average of four or more determinations.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 establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Some specifichazards statements are given in Section 7 on Hazards.2.Referenced Documents2.1 ASTM Standards:2D75/D75M Practice for Sampling AggregatesD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE135 Terminology Relating to Analytical Chemistry forMetals,Ores,and Related MaterialsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE1361 Guide for Correction of Interelement Effects inX-Ray Spectrometric AnalysisE1601 Practice for Conducting an Interlaboratory Study toEvaluate the Performance of an Analytical MethodE1621 Guide for Elemental Analysis by Wavelength Disper-sive X-Ray Fluorescence SpectrometryF2576 Terminology Relating to Declarable Substances inMaterials2.2 ANSI Standard:3N43.2 Radiation Safety for X-Ray Diffraction and Fluores-cence Analysis Equipment2.3 AASHTO Standard:4TP-97-11 Test Method for Glass Beads used in PavementMarkings1This test method is under the jurisdiction of ASTM Committee F40 onDeclarable Substances in Materials and is the direct responsibility of SubcommitteeF40.01 on Test Methods.Current edition approved Feb.15,2013.Published March 2013.DOI:10.1520/F2980-13.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from American Association of State Highway and TransportationOfficials(AASHTO),444 N.Capitol St.,NW,Suite 249,Washington,DC 20001,http:/www.transportation.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.Terminology3.1 DefinitionsDefinitions of terms applying to X-rayfluorescence(XRF)and declarable substances appear in Ter-minologies E135 and F2576,respectively.3.2 Compton-matrix correction,nmeasured intensity ofCompton or incoherent scattered radiation may be used directlyto compensate for matrix effects or indirectly for the determi-nation of the effective mass absorption coefficient to correct formatrix effects.53.2.1 DiscussionThe compensation for matrix effects isbased on a combination of sample preparation and experimen-tal intensity data.3.3 Compton scatter,ninelastic scattering of an X-rayphoton through its interaction with the bound electrons of anatom.3.3.1 DiscussionThis process is also referred to as inco-herent scatter.3.4 fundamental parameters,FP,model,nmodel for cali