Designation:D511−14(Reapproved2021)´1StandardTestMethodsforCalciumandMagnesiumInWater1ThisstandardisissuedunderthefixeddesignationD511;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.ε1NOTE—TheWTOcaveatwasaddededitoriallyinDecember2021.1.Scope1.1Thesetestmethodscoverthedeterminationofcalciumandmagnesiuminwaterbycomplexometrictitrationandatomicabsorptionspectrometricprocedures.Twotestmethodsareincluded,asfollows:SectionsTestMethodA—ComplexometricTitration7–15TestMethodB—AtomicAbsorptionSpectrometric16–251.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversiontoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Specifichazardstatementsaregivenin12.2.6and20.6.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD2777PracticeforDeterminationofPrecisionandBiasofApplicableTestMethodsofCommitteeD19onWaterD3370PracticesforSamplingWaterfromFlowingProcessStreamsD4691PracticeforMeasuringElementsinWaterbyFlameAtomicAbsorptionSpectrophotometryD4841PracticeforEstimationofHoldingTimeforWaterSamplesContainingOrganicandInorganicConstituentsD5...
