Designation:D5758−01(Reapproved2011)´1StandardTestMethodforDeterminationofRelativeCrystallinityofZeoliteZSM-5byX-RayDiffraction1ThisstandardisissuedunderthefixeddesignationD5758;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—UpdatedZSM-5powderavailabilityfootnoteeditoriallyinOctober2011.1.Scope1.1ThistestmethodcoversaprocedurefordeterminationoftherelativecrystallinityofzeoliteZSM-5usingselectedpeaksfromtheX-raydiffractionpatternofthezeolite.1.2ThetestmethodprovidesanumberthatistheratioofintensityofaportionoftheXRDpatternofthesampleZSM-5tointensityofthecorrespondingportionofthepatternofareferenceZSM-5.Theintensityratio,expressedasapercentage,isthenlabeledpercentXRDrelativecrystallinity/ZSM-5.Thistypeofcomparisoniscommonlyusedinzeolitetechnologyandisoftenreferredtoaspercentcrystallinity.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D3906TestMethodforDeterminationofRelativeX-rayDiffractionIntensitiesofFaujasite-TypeZeolite-ContainingMaterialsD5357TestMethodforDeterminationofRelativeCrystal-linityofZeoliteSodiumAbyX-rayDiffractionE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE456TerminologyRelatingtoQualityandStatisticsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.SummaryofTestMethod3.1XRDpatternsofthesampleZSM-5andthereferenceZSM-5areobtainedunderthesameconditions.Fromthesepatterns,thereisachoicefromtwoproceduresforcalculationofrelativecrystallinity/ZSM-5.3.1.1ProcedureA(IntegratedPeakAreaMethod)—Acom-parisonismadeofthesumsofintensities(sampleversusreference)ofthes...
