Designation:D3761−10StandardTestMethodforTotalFluorineinCoalbytheOxygenBombCombustion/IonSelectiveElectrodeMethod1ThisstandardisissuedunderthefixeddesignationD3761;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thistestmethodcoverstheanalysisoftotalfluorineincoal.1.2Thistestmethodwassuccessfullytestedoncoalscontaining25%ashorless.21.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection7.1.5AllaccountabilityandqualitycontrolaspectsofGuideD4621applytothistestmethod.2.ReferencedDocuments2.1ASTMStandards:3D1193SpecificationforReagentWaterD2013PracticeforPreparingCoalSamplesforAnalysisD3173TestMethodforMoistureintheAnalysisSampleofCoalandCokeD3180PracticeforCalculatingCoalandCokeAnalysesfromAs-DeterminedtoDifferentBasesD4621GuideforQualityManagementinanOrganizationThatSamplesorTestsCoalandCoke(Withdrawn2010)4D5142TestMethodsforProximateAnalysisoftheAnalysisSampleofCoalandCokebyInstrumentalProcedures(Withdrawn2010)4E144PracticeforSafeUseofOxygenCombustionBombs3.SummaryofTestMethod3.1Totalfluorineisdeterminedinthistestmethodbycombustingaweighedsampleinanoxygenbombwithadilutebaseabsorbingthefluorinevapors.Thebombisrinsedintoabeakerwithwaterandfollowingtheadditionofacitratebuffer,thefluorineisdeterminedbyion-selectiveelectrode.4.SignificanceandUse4.1Thistestmethodpermitsmeasurementofthefluorinecontentofcoalfortheevaluationofpotentialfluorineemissionfromcoalcombusti...
