Designation:C560−15´1AnAmericanNationalStandardStandardTestMethodsforChemicalAnalysisofGraphite1ThisstandardisissuedunderthefixeddesignationC560;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—Subsection1.2wascorrectededitoriallyinFebruary2017.1.Scope*1.1Thesetestmethodscoverthechemicalanalysisofgraphite.1.2Theanalyticalproceduresappearinthefollowingorder:SectionsSiliconbytheMolybdenumBlue(Colorimetric)TestMethod9to15Ironbytheo-Phenanthroline(Colorimetric)TestMethod16to22CalciumbythePermanganate(Colorimetric)TestMethod23to29Aluminumbythe2-QuinizarinSulfonicAcidTestMethod30to36TitaniumbythePeroxide(Colorimetric)TestMethod37to44Vanadiumbythe3,3'-Dimethylnaphthidine(Colorimetric)TestMethod45to52BoronbytheCurcumin-OxalicAcid(Colorimetric)TestMethod53to601.3Thepreferredconcentrationofsoughtelementinthefinalsolution,thelimitsofsensitivity,andtheprecisionoftheresultsaregiveninTable1.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.See56.1forspecificcautionstatement.2.ReferencedDocuments2.1ASTMStandards:2C561TestMethodforAshinaGraphiteSampleD1193SpecificationforReagentWaterE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecifications3.Terminology3.1Definitions:3.1.1calibrationcurve,n—graphicalormathematicalrep-resentationoftherelationshipbetweenknownconcentrationsofanelementinaseriesofstandardcalibrationsolutionsandthemeasuredresponsefromthemeasurementsystem.3.1.2calibrationsolutions,n—solutionsofaccuratelyknownconcentrationsofthechemica...
