Designation:C471M−17´1StandardTestMethodsforChemicalAnalysisofGypsumandGypsumProducts(Metric)1ThisstandardisissuedunderthefixeddesignationC471M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—Correctedequationreferencein9.6andrestoreditem(6)tolistin16.1editoriallyinAugust2017.1.Scope*1.1Thesetestmethodscoverthechemicalanalysisofgypsumandgypsumpanelproducts,includinggypsumready-mixedplaster,gypsumwood-fiberedplaster,andgypsumconcrete.1.2Thetestmethodsappearinthefollowingorder:SectionsPreparationofSample4CompleteProcedure5–16AlternativeProcedureforAnalysisofFreeWaterin17GypsumUsingaMoistureBalanceAlternativeProcedureforAnalysisofCombinedWaterin18GypsumUsingaMoistureBalanceAlternativeProcedureforAnalysisforCalciumSulfateby19AmmoniumAcetateMethodAlternativeProcedureforAnalysisforSodiumChlorideby20theCoulometricMethodDeterminationofSandinSetPlaster21Wood-FiberContentinWood-FiberGypsumPlaster22OptionalProcedureforAnalysisforSodiumbytheAtomic23AbsorptionMethodOptionalProcedureforAnalysisforSodiumbyFlame24PhotometryDeterminationofOrthorhombicCyclooctasulfur(S8)in25GgypsumPanelProducts—GeneralProvisionsDeterminationofOrthorhombicCyclooctasulfur(S8)in26GypsumPanelProductsbyGasChromatographEquippedwithaMassSpectrometer(GS/MS)DeterminationofOrthorhombicCyclooctasulfur(S8)in27GypsumPanelProductsbyGasChromatographEquippedwithanElectronCaptureDetector(GC/ECD)DeterminationofOrthorhombicCyclooctasulfur(S8)in28GypsumPanelProductsbyHigh-performanceLiquidChromatographEquippedwithandUltravioletDetector(HPLC⁄UV)1.3Thetextofthisstandardreferencesnotesandfootnotesthatprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.5Thisstandarddo...
