Designation:D1108−96(Reapproved2013)TechnicalAssociationofPulpandPaperIndustryStandardMethodT204-os-76StandardTestMethodforDichloromethaneSolublesinWood1ThisstandardisissuedunderthefixeddesignationD1108;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthedichlo-romethanesolublecontentofwood,whichisameasureofthewaxes,fats,resins,oils,andsimilarmaterials.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Specificprecau-tionarystatementsaregivenin4.1.2.SignificanceandUse2.1Dichloromethaneextractablecontentofwoodisamea-sureofsuchsubstancesaswaxes,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.4.Reagent4.1Dichloromethane,98%,CH2Cl2,USPNOTE1—Dichloromethanehasbeendeterminedtobeasuitablesubstituteforether.Itismuchsafertouseandthusrecommendedforthisprocedure.(Warning—Dichloromethanecausesnarcosiswheninhaledandcanbeirritatingtotheeyes.Propercautionshouldbeused.)5.TestSpecimen5.1Thetestspecimenshallconsistof2gofair-driedsawdustthathasbeenground...
