Designation:D6761−07(Reapproved2012)StandardTestMethodforDeterminationoftheTotalPoreVolumeofCatalystsandCatalystCarriers1ThisstandardisissuedunderthefixeddesignationD6761;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthetotalporevolumeofcatalystsandcatalystcarriers,thatis,thevolumeofporeshavingporediameterbetweenapproximately14µmand0.4nm(4Å).1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3WARNING—Mercuryhasbeendesignatedbymanyregulatoryagenciesasahazardousmaterialthatcancausecentralnervoussystem,kidneyandliverdamage.Mercury,oritsvapor,maybehazardoustohealthandcorrosivetomaterials.Cautionshouldbetakenwhenhandlingmercuryandmercurycontainingproducts.SeetheapplicableproductMa-terialSafetyDataSheet(MSDS)fordetailsandEPA’swebsite—http://www.epa.gov/mercury/faq.htm—foraddi-tionalinformation.Usersshouldbeawarethatsellingmercuryand/ormercurycontainingproductsintoyourstateorcountrymaybeprohibitedbylaw.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.SpecifichazardstatementsaregiveninSection8.Warningstatementsaregivenin9.1.4,9.1.7,and9.1.11.2.ReferencedDocuments2.1ASTMStandards:2D3766TerminologyRelatingtoCatalystsandCatalysisE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE456TerminologyRelatingtoQualityandStatisticsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.Terminology3.1Definitions:3.1.1particlevolume—thevolumeofaparticleincludingporesintowhichmercurycannotpenetrateatambientpressure(smallerthanapproximately14...
