Designation:D3516−89(Reapproved2011)StandardTestMethodsforAshingCellulose1ThisstandardisissuedunderthefixeddesignationD3516;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thesetestmethodscoverfourashingmethodsforcellulose.Theseareintendedforuseonunbleachedandbleachedcelluloseinsheetedorbulkfiberform.Eachoneofthetestmethodshasadvantages,sothatpreferenceapplica-tionsexistforallfour.1.2Thetestmethodsappearasfollows:SectionsTestMethodA—AshinCelluloseat575°C6to11TestMethodB—SulfatedAshinCelluloseat575°C12to17TestMethodC—AshingCellulosebySchonigerOxidation18to22TestMethodD—WetAshingofCelluloseforInorganics23to291.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Foraspecifichazardstatement,see20.6.1.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterD1348TestMethodsforMoistureinCellulose3.SummaryofTestMethods3.1TestMethodA,AshinCelluloseat575°C—Thistestmethodmeasurestheashcontentofcellulose,whichisdefinedforthistestastheresidueremainingafterignitionat575625°Cuntilallcarbonhasbeenburnedoff.Itisthesimplestofthefourtestmethodsforthedeterminationofashcontentonly,anditshouldnotbeconsideredasastandardpreparativeprocedureforelementalanalysis.NOTE1—Theashcontentatthisignitiontemperatureisareasonablemeasureofthemineralsaltsandinorganicforeignmatterinthecellulose.Theweightofashobtainedvarieswiththetemperatureofignition.Highertemperatures(850°C)willconvertcalciumcarbonateandothercarbonatestotheoxidesandthusgivelowervaluesforash.Thecomposition...
