Designation:D3133–01(Reapproved2005)StandardTestMethodforQuantitativeDeterminationofCelluloseNitrateinAlkydModifiedLacquersbyInfraredSpectrophotometry1ThisstandardisissuedunderthefixeddesignationD3133;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthequantitativedeterminationofthecontentofcellulosenitrate(alsoknownasnitrocellulose)inlacquerscontainingalkydresins.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Foraspecifichazardstatement,see7.1.1.2.ReferencedDocuments2.1ASTMStandards:2D1644TestMethodsforNonvolatileContentofVarnishesD2372PracticeforSeparationofVehiclefromSolvent-ReduciblePaintsE168PracticesforGeneralTechniquesofInfraredQuanti-tativeAnalysisE275PracticeforDescribingandMeasuringPerformanceofUltraviolet,Visible,andNear-InfraredSpectrophotom-eters3.SummaryofTestMethod3.1Themethodofstandardadditionsisemployed.Incre-mentsofcellulosenitrate,insolution,areaddedtoaliquotsofthesample.Absorbancemeasurementsaremadeofthebandat11.8µm(848cm−1)foreachaddition.Theoriginalcontentisthencalculatedfromabsorbanceversusconcentration.4.SignificanceandUse4.1Coatingcompositionsbasedonamixtureofsyntheticresinsandcellulosenitratedissolvedinorganicsolventsarequantitativelyanalyzedforthecellulosicderivativewithoutisolatingit.Thetestmethodisapplicabletolacquersforwhichthegradeofnitrocelluloseisknownandavailable.Othercellulosics,alkydresins,manyvinylresins,andsolventsdonotinterfere.Components,suchasacrylicresinsandsomevinylpolymers,thatabsorbinfrare...
