Designation:D3235−15StandardTestMethodforSolventExtractablesinPetroleumWaxes1ThisstandardisissuedunderthefixeddesignationD3235;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversthedeterminationofsolventextractablesinpetroleumwaxes.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E1SpecificationforASTMLiquid-in-GlassThermometersE128TestMethodforMaximumPoreDiameterandPerme-abilityofRigidPorousFiltersforLaboratoryUse3.SummaryofTestMethod3.1Thesampleisdissolvedinamixtureconsistingof50volume%methylethylketoneand50volume%toluene.Thesolutioniscooledto−32°C(−25°F)toprecipitatethewax,thenfiltered.Thesolventextractablescontentisdeterminedbyevaporatingthesolventfromthefiltrateandweighingtheresidue.4.SignificanceandUse4.1Thesolventextractablesinawaxmayhavesignificanteffectsonseveralofitspropertiessuchasstrength,hardness,flexibility,scuffresistance,coefficientoffriction,coefficientofexpansion,meltingpoint,andstainingcharacteristics.Whethertheseeffectsaredesirableorundesirabledependsontheintendeduseofthewax.5.Apparatus5.1FilterStickandAssembly,consistingofa10mmdiam-etersinteredglassfilterstickof10µmto15µmmaximumporediameterasdeterminedbythemethodinAppendixX1,providedwithanairpressureinlettubeanddeliverynozzle.Itisprovidedwithaground-glassjointtofita25mmby170mmtesttube.ThedimensionsforasuitablefiltrationassemblyareshowninFig.1.NOTE1—Ametallicfilterstickmaybeemployedifdesired.Afilterstick3madeofstainlesssteela...
