Designation:D6980−12StandardTestMethodforDeterminationofMoistureinPlasticsbyLossinWeight1ThisstandardisissuedunderthefixeddesignationD6980;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthequantitativedeterminationofmoisturebymeansoflossinweighttechnologydownto50mg/kgasitappliestomostplastics.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Specimenstestedbythismethodwillbehot,usecautionwhenhandlingthemaftertestinghasbeencompleted.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—ThereisnoknownISOequivalenttothisstandard.2.ReferencedDocuments2.1ASTMStandards:2D883TerminologyRelatingtoPlasticsD1600TerminologyforAbbreviatedTermsRelatingtoPlas-ticsD6869TestMethodforCoulometricandVolumetricDeter-minationofMoistureinPlasticsUsingtheKarlFischerReaction(theReactionofIodinewithWater)E691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.Terminology3.1Definitions—ThedefinitionsusedinthistestmethodareinaccordancewithTerminologiesD883andD1600.3.2Symbols:3.2.1lift—theresultofconvectioncurrentscreatedduringtheheatingofthespecimenraisingthesamplepanoffofitssupportfalselyindicatingamoistureloss.3.2.1.1Discussion—Theeffectsofliftarecompensatedforindifferentwaysbydifferentmanufacturers.3.2.2tempering—aprocessthatre-definesthemolecularstructureofametaltoenhanceitsperformance.4.SummaryofTestMethod4.1Thespecimenisspreadontoasamplepanthatissupportedonabalanceinaheatingchamberthathasbeenpreheatedandequilibratedtothespecifiedidletemperature.Itisthenheatedtovaporizethemoisture.Theanalysisiscompletedwhentheindica...
