Designation:D4208−19StandardTestMethodforTotalChlorineinCoalbytheOxygenVesselCombustion/IonSelectiveElectrodeMethod1ThisstandardisissuedunderthefixeddesignationD4208;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoverstheanalysisoftotalchlorineincoal.1.2Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D121TerminologyofCoalandCokeD1193SpecificationforReagentWaterD3173TestMethodforMoistureintheAnalysisSampleofCoalandCokeD3180PracticeforCalculatingCoalandCokeAnalysesfromAs-DeterminedtoDifferentBasesE144PracticeforSafeUseofOxygenCombustionVesselsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.Terminology3.1Fordefinitionsoftermsusedinthistestmethod,refertoTerminologyD121.4.SummaryofTestMethod4.1Totalchlorineisdeterminedinthismethodbycombus-tingaweighedsampleinanoxygencombustionvesselwithdilutebaseadsorbingthechlorinevapors.Thevesselisrinsedintoabeakerwithwaterandfollowingtheadditionofanionicstrengthadjuster,thechlorideisdeterminedbyion-selectiveelectrode.5.SignificanceandUse5.1Thepurposeofthistestmethodistomeasurethetotalchlorinecontentofcoal.Thechlorinecontentofcoalsmayb...
