Designation:D2079–92(Reapproved1998)StandardTestMethodforNonvolatileMatter(Solids)inFattyQuaternaryAmmoniumChlorides1ThisstandardisissuedunderthefixeddesignationD2079;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThismethodwaspreparedjointlybytheAmericanSocietyforTestingandMaterialsandtheAmericanOilChemists’Society.1.Scope1.1Thismethodcoversthedeterminationofnonvolatilematter(solids)infattyquaternaryammoniumchlorides.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.SummaryofTestMethod2.1Volatilematterisevaporatedunderheatandvacuumandthenonvolatilematterdetermined.3.Apparatus3.1VacuumOven,withsuitablecontrolsformaintainingatemperatureof10562°C.3.2AirOven,withsuitablecontrolsformaintainingatemperatureof10562°C.4.Procedure4.1Ifnotaliquid,meltthesampleusingawaterbath.Mixthesamplethoroughlyandaccuratelyweigh0.7to1.0gto0.1mgintoa50-mLnarrow-mouthErlenmeyerflask.Placetheflaskintheairovenfor1hat10562°C.Afterabout15minofoventime,rotatetheflaskgentlytocoatthespecimenovertheentirebottomoftheflask.Placetheflaskinavacuumovenfor8hat10562°Candavacuum(negativegagepressure)of27to29in.Hg(absolutepressureof25to35mmHg).Coolinadesiccatorfor1⁄2handreweigh.5.Calculation5.1Calculatethepercentofnonvolatilematter(solids)asfollows:Nonvolatilematter~solids!,%5~R3100!/S(1)where:R=gramsofresidue,andS=specimenweightused,g.6.PrecisionandBias6.1Precisionandbiaswerenotestablishedatthetimethistestmethodwaswritten.Aneffortisbeingmadetoobtaintheprecisionand,ifobtainable,itwillbepublishedinfuturerevisons.Thistestmethodhasbeeninuseformanyyears,anditsusefulnesshasbeenwellestablished.7.Keywords7.1no...
