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Designation: D6247 − 18 (Reapproved 2024)Standard Test Method forDetermination of Elemental Content of Polyolef i ns byWavelength Dispersive X-ray Fluorescence Spectrometry 1This standard is issued under the f i xed designation D6247; 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 a general procedure for thedetermination of elemental content in polyolef i ns bywavelength-dispersive X-ray f l uorescence (WDXRF)spectrometry, in mass fraction ranges typical of those contrib-uted by additives, catalysts, and reactor processes. The ele-ments covered by this test method include f l uorine, sodium,magnesium, aluminum, silicon, phosphorus, sulfur, calcium,titanium, chromium, and zinc in the composition ranges givenin Table 1.TABLE 1 Mass Fraction Ranges for Additive and Trace Elementsin Polyolef i nsElement LowerLimit(mg/kg)UpperLimit(mg/kg)Fluorine 100 300Sodium 25 200Magnesium 10 600Aluminum 40 500Silicon 30 1000Phosphorus 5 200Sulfur 20 200Calcium 10 300Titanium 5 200Chromium 5 100Zinc 10 10001.1.1 This test method does not apply to polymers specif i -cally formulated to contain f l ame retardants including bromi-nated compounds and antimony trioxide.1.1.2 This test method does not apply to polymers formu-lated to contain high levels of compounds of vanadium,molybdenum, cadmium, tin, barium, lead, and mercury be-cause the performance can be strongly inf l uenced by spectralinterferences or interelement effects due to these elements.N OTE 1—Specif i c methods and capabilities of users may vary withdifferences in interelement effects and sensitivities, instrumentation andapplications software, and practices between laboratories. Developmentand use of test procedures to measure particular elements, mass fractionranges or matrices is the responsibility of individual users.N OTE 2—One general method is outlined herein; alternative analyticalpractices can be followed, and are attached in notes, where appropriate.1.2 The values stated in SI units are to be regarded as thestandard.1.3 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, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specif i c precautionary statements are given in Section 10.N OTE 3—There is no known ISO equivalent to this standard.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards: 2C1118 Guide for Selecting Components for Wavelength-Dispersive X-Ray Fluorescence (XRF) Systems (With-drawn 2011) 3D883 Terminology Relating to PlasticsD4703 Practice for Compression Molding ThermoplasticMaterials into Test Specimens, Plaques, or SheetsD6247 Test Method for Determination of Elemental Contentof Polyolef i ns by Wavelength Dispersive X-ray Fluores-cence SpectrometryE29 Practice for Using Signif i cant Digits in Test Data toDetermine Conformance with Specif i cationsE135 Terminology Relating to Analytical Chemistry forMetals, Ores, and Related MaterialsE1361 Guide for Correction of Interelement Effects inX-Ray Spectrometric AnalysisE1601 Practice for Conducting an Interlaboratory Study toEvaluate the Performance of an Analytical Method1 This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.70 on Analytical Methods.Current edition approved Aug. 1, 2024. Published August 2024. Originallyapproved in 1998. Last previous edition approved in 2018 as D6247 - 18. DOI:10.1520/D6247-18R24.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at www.astm.org/contact. For Annual Book ofASTM Standards volume information, refer to the standard’s Document Summarypage on the ASTM website.3 The last approved version of this historical standard is referenced onwww.astm.org.Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1