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1、MicrocrystallineCelluloseCellulose-[9004-34-6].DEFINITIONMicrocrystallineCelluloseispurified,partiallydepolymerizedcellulosepreparedbytreatingalphacellulose,obtainedasapulpfromfibrousplantmaterial,withmineralacids.IDENTIFICATION•A.ProcedureIodinatedzincchloridesolution:Dissolve20gof
2、zincchlorideand6.5gofpotassiumiodidein10.5mLofwater.Add0.5gofiodine,andshakefor15min.Sample:10mgAnalysis:PlacetheSampleonawatchglass,anddispersein2mLofIodinatedzincchloridesolution.Acceptancecriteria:Thesubstancetakesonaviolet-bluecolor.Changetoread:•B.ProcedureSample:1.3gofMicrocry
3、stallineCellulose,accuratelyweighedto0.1mgAnalysis:TransfertheSampletoa125-mLconicalflask.Add25.0mLofwaterand25.0mLof1.0Mcupriethylenediaminehydroxidesolution.Immediatelypurgethesolutionwithnitrogen,insertthestopper,andshakeonawrist-actionshaker,orothersuitablemechanicalshaker,until
4、completelydissolved.TransferanappropriatevolumeoftheSamplesolutiontoacalibratednumber150Cannon-Fenske,orequivalent,viscometerAllowthesolutiontoequilibrateat25±O.lQjforNLT5min.Timetheflowbetweenthetwomarksontheviscometer,andrecordtheflowtime,t,ins.Calculatethekinematicviscosity,(KV),
5、,oftheMicrocrystallineCellulosetaken:Result=t,xk,k,=flowtime(s)=viscometerconstant(seeViscosity——CapillaryMethodsP**、.l-fcUy-2015)/Obtaintheflowtime,t2,for0.5Mcupriethylenediaminehydroxidesolutionsusinganumber100Cannon-Fenske,orequivalent,viscometer.Calculatethekinematicviscosity,(K
6、V)2,ofthesolvent:Result=t2xk2t,=flowtimefor0.5Mcupriethylenediaminehydroxidesolutions(s)k,=viscometerconstantDeterminetherelativeviscosity,[J„oftheMicrocrystallineCellulosespecimentaken:Result=(KV)7(KV)2(KV),=kinematicviscosityoftheMicrocrystallineCellulosetaken(KV),=kinematicviscos
7、ityofthesolventDeterminetheintrinsicviscosity,[EJC,byinterpolation,usingtheIntrinsicViscosityTableintheReferenceTablessection.Calculatethedegreeofpolymerization,P:Result=[(95)x(jc]/{Wsx[(100U%LOD)/100]}=intrinsicviscosityI%L0D=weightoftheMicrocrystallineCellulosetaken(g)=valueobtain
8、edfromthetestforLos
