Designation:D2797/D2797M−21aStandardPracticeforPreparingCoalSamplesforMicroscopicalAnalysisbyReflectedLight1ThisstandardisissuedunderthefixeddesignationD2797/D2797M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoverslaboratoryproceduresforthepreparationofgranularsamplesofbituminouscoalandanthra-citesamplesforexaminationwithamicroscopeusingreflectedlightillumination.Itdoesnotapplytothepreparationoforientedblocksofcoal.1.2Units—ThevaluesstatedineitherSIunitsornon-SIunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemarenotnecessarilyexactequivalents;therefore,toensureconformancewiththestandard,eachsystemshallbeusedindependentlyoftheother,andvaluesfromthetwosystemsshallnotbecombined.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D2013PracticeforPreparingCoalSamplesforAnalysisD2234/D2234MPracticeforCollectionofaGrossSampleofCoalD2798TestMethodforMicroscopicalDeterminationoftheVitriniteReflectanceofCoalD2799TestMethodforMicroscopicalDeterminationoftheMaceralCompositionofCoalD4596PracticeforCollectionofChannelSamplesofCoalinaMineE11SpecificationforWovenWireTestSieveClothandTestSieves3.SummaryofPractice3.1Arepresentativesampleiscrushedtoaspecifiedparticlesize,air-dried,mixedwithabinder,andformedinto...
