ASTM_C_560_-_15e1.pdf

Designation:C560151An American National StandardStandard Test Methods forChemical Analysis of Graphite1This standard is issued under the fixed designation C560;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.1NOTESubsection 1.2 was corrected editorially in February 2017.1.Scope*1.1 These test methods cover the chemical analysis ofgraphite.1.2 The analytical procedures appear in the following order:SectionsSilicon by the Molybdenum Blue(Colorimetric)Test Method9 to 15Iron by the o-Phenanthroline(Colorimetric)Test Method16 to 22Calcium by the Permanganate(Colorimetric)Test Method23 to 29Aluminum by the 2-Quinizarin Sulfonic Acid Test Method30 to 36Titanium by the Peroxide(Colorimetric)Test Method37 to 44Vanadium by the 3,3-Dimethylnaphthidine(Colorimetric)Test Method45 to 52Boron by the Curcumin-Oxalic Acid(Colorimetric)Test Method53 to 601.3 The preferred concentration of sought element in thefinal solution,the limits of sensitivity,and the precision of theresults are given in Table 1.1.4 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.See 56.1 forspecific caution statement.2.Referenced Documents2.1 ASTM Standards:2C561 Test Method for Ash in a Graphite SampleD1193 Specification for Reagent WaterE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3.Terminology3.1 Definitions:3.1.1 calibration curve,ngraphical or mathematical rep-resentation of the relationship between known concentrationsof an element in a series of standard calibration solutions andthe measured response from the measurement system.3.1.2 calibration solutions,nsolutions of accuratelyknown concentrations of the chemical element to be deter-mined using the calibration curve method.3.1.3 colorimetricanalysis,nphotometricanalysismethod of using absorption of monochromatic light in thevisible spectrum.3.1.4 photometric analysis,nanalytical chemistry methodfor quantitative chemical analysis based on the relationshipbetween solution concentrations and the absorption of mono-chromatic light,as expressed by the Beer law.4.Significance and Use4.1 These test methods provide a practical way to measurethe concentration of certain trace elements in graphite.Manyend uses of graphite require that it be free of elements whichmay be incompatible with certain nuclear applications.Otherelemental contamination can affect the rate of oxidative deg-radation.4.2 These test methods allow measurement of trace amountsof contaminants with a minimal amount of costly equipment.The colorimetric procedures used are accessible to mostlaboratories.4.3 Other instrumental analysis techniques are available,capable of simultaneous quantitative analysis of 76 stableelements in a single run,with detectability limits in the partsper million range.Standards are currently being developed forelemental analysis of impurities in graphite using glow dis-charge mass spectrometry(GDMS),inductively coupledplasma optical emission spectroscopy(ICP-OES),combustionion chromatography(CIC).5.Reagents5.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended that1These test methods are under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and are the direct responsibility of Subcommit-tee D02.F0 on Petroleum Products,Liquid Fuels,and LubricantsCurrent edition approved Oct.1,2015.Published November 2015.Originallyapproved in 1965.Last previous edition approved in 2010 as C560 88(2010)1.DOI:10.1520/C0560-15E01.2For 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.*A Summary of Changes section appears at the end of this standardCopyright 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 all reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.3Other g