Designation:D1108−21StandardTestMethodforDichloromethaneSolublesinWood1,2ThisstandardisissuedunderthefixeddesignationD1108;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthedichlo-romethanesolublecontentofwood,whichisameasureofthewaxes,fats,resins,oils,andsimilarmaterials.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Specificprecautionarystatementsaregivenin4.1.1.3Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.SignificanceandUse2.1Dichloromethaneextractablecontentofwoodisamea-sureofsubstancessuchaswaxes,fats,resins,phytosterols,andnonvolatilehydrocarbons.Theamountisinfluencedbyseason-ingordryingthewood.3.Apparatus3.1FilteringCrucibles—Alundumorfritted-glassfilteringcruciblesofcoarseporosityshallbeused.3.2ExtractionApparatus—AcompactformofSoxhletex-tractionapparatus,withground-glassjoints,ispreferable.Theapparatusshallconsistofthefollowingitems:3.2.1SoxhletExtractionFlask,havingacapacityof250mL.3.2.2SoxhletExtractionTube,45to50mmininsidediameter,havingacapacitytothetopofthesiphonofapproximately100mLandasiphontubeapproximately55mminheight.Extractiontubesofthesedimensionssiphonmorerapidlythanextractorswithhighersiphontubes.3.2.3Condenser,watercooled.4.Reagent4.1Dichloromethane,98%,CH2Cl2,USP.(Warning—Dichloromethanecausesnarcosiswheninhaledandcanbeirritatingtotheeyes.Pr...
