Designation:D1013–93(Reapproved1998)StandardTestMethodforDeterminingTotalNitrogeninResinsandPlastics1ThisstandardisissuedunderthefixeddesignationD1013;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationoftotalnitrogeninnitrogen-containingplastics,resins,andresinsolutions.Thistestmethodisnotapplicableforuseonmaterialscontainingnitro-groups.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D1193SpecificationforReagentWater23.SignificanceandUse3.1Totalnitrogencontentgivesanindicationofthelevelorpurityofanitrogen-containingmaterialsuchasanamineresin.Itisimportantforthequalitycontrolofamineresinsandisoftenusedtodeterminewhethertheproperamountsofmanytypesofnitrogen-containingmaterialsarepresentinformu-latedproducts.4.Apparatus4.1KjeldahlFlasks,fordigestionanddistillation,800-mLcapacity,moderatelyheavywall,andmadeofhardglass.4.2ConnectingBulbs,oftheDavissontype,orabulbequallyeffectiveinpreventingmechanicalcarry-overofthecontentsofthedistillationflasktothecondenser.4.3DigestionandDistillationEquipment—AsuitableKjeldahldigestionanddistillationapparatus,suchasanyofthewell-knowncommercialunitsformultiplework.Theunitsmaybeheatedeitherelectricallyorbygasburner.4.4ConnectingTubesmadeofmoderatelyheavy-wallglasstubing,6to8in.(150to200mm)inlength,forconductingthedistillatefromthecondensertothereceiver.4.5WeighingTube(forLiquidResins)—Anyconvenientdeviceforweighingafewgramsofsampleinamattersuchthatnolossofvolatileconstituentswillbesustaine...
