Designation: C889 − 26Standard Test Methods forChemical and Mass Spectrometric Analysis of Nuclear-Grade Gadolinium Oxide (Gd 2 O 3 ) Powder 1This standard is issued under the f i xed designation C889; 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.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 These test methods cover procedures for the chemicaland mass spectrometric analysis of nuclear-grade gadoliniumoxide powders to determine compliance with specif i cations.1.2 The analytical procedures appear in the following order:SectionsCarbon by Direct Combustion—Thermal Conductivity2C1408 Test Method for Carbon (Total) in Uranium OxidePowders and Pellets By Direct Combustion-InfraredDetection Method3Total Chlorine and Fluorine by Pyrohydrolysis Ion—Selective Electrode4C1502 Test Method for Determination of Total Chlorine andFluorine in Uranium Dioxide and Gadolinium Oxide3Loss of Weight on Ignition 8 – 14Sulfur by Combustion—Iodometric Titration5Impurity Elements by a Spark-Source Mass SpectrographicMethod2C761 Test Methods for Chemical, Mass Spectrometric,Spectrochemical, Nuclear, and Radiochemical Analysis ofUranium Hexaf l uoride3C1287 Test Method for Determination of Impurities inNuclear Grade Uranium Compounds by InductivelyCoupled Plasma Mass Spectrometry3Gadolinium Content in Gadolinium Oxide by ImpurityCorrection Method15 – 181.3 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, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specif i c hazard statements, see Section 6.1.5 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: 3C761 Test Methods for Chemical, Mass Spectrometric,Spectrochemical, Nuclear, and Radiochemical Analysis ofUranium Hexaf l uorideC859 Terminology Relating to Nuclear MaterialsC888 Specif i cation for Nuclear-Grade Gadolinium Oxide(Gd 2 O 3 ) PowderC1287 Test Method for Determination of Impurities inNuclear Grade Uranium Compounds by InductivelyCoupled Plasma Mass SpectrometryC1408 Test Method for Carbon (Total) in Uranium OxidePowders and Pellets By Direct Combustion-Infrared De-tection MethodC1502 Test Method for Determination of Total Chlorine andFluorine in Uranium Dioxide and Gadolinium OxideD1193 Specif i cation for Reagent Water3. Terminology3.1 Def i nitions:3.1.1 Except as otherwise def i ned herein, def i nitions ofterms are as given in Terminology C859.4. Signif i cance and Use4.1 Gadolinium oxide powder is used, with subsequentprocessing, in nuclear fuel applications, such as an addition touranium dioxide. These test methods are designed to determinewhether the material meets the requirements described inSpecif i cation C888.4.1.1 The material is analyzed to determine whether itcontains the minimum gadolinium oxide content specif i ed.1 These test methods are under the jurisdiction of ASTM Committee C26 onNuclear Fuel Cycle and are the direct responsibility of Subcommittee C26.05 onMethods of Test.Current edition approved July 1, 2026. Published July 2026. Originally approvedin 1978. Last previous edition approved in 2018 as C889 – 18. DOI: 10.1520/C0889-26.2 Discontinued January 1999. See C1408.3 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.4 Discontinued March 2005. See C1502.5 Discontinued January 1999. See C889 – 90.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
