Designation:D2077–92(Reapproved1998)StandardTestMethodforAshinFattyQuaternaryAmmoniumChlorides1ThisstandardisissuedunderthefixeddesignationD2077;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThistestmethodwaspreparedjointlybyASTMandtheAmericanOilChemists’Society.1.Scope1.1Thistestmethodcoversthedeterminationofthenon-volatilematterremainingafteraspecimenoffattyquaternaryammoniumchlorideiscompletelyburnedandignited.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.Apparatus2.1Crucible—Aporcelainorhigh-silicacontentglassof250-mLcapacity.2.2ElectricMuffleFurnace.2.3Triangle,Nichromeorclay.3.Procedure3.1Igniteacrucibleinthemufflefurnaceat550to600°C.Coolslightly,placeinadesiccatorfor1handweigh.Meltthesampleifitisnotalreadyliquid,inawaterbath.Mixthoroughlyandweigh20gto0.1mgintothecrucible.Heatgentlybymovingaflameonthebottomandsidesofthecrucibleuntilthespecimenignites.Reducethesizeoftheflameuntiltheheatisjustsufficienttokeepthespecimenburning.Continuetheheatingofthespecimentoablackcharandtransferthecrucibletothemufflefurnace,heatat550to600°Cfor1h.Removethecruciblefromthefurnace,coolslightly,placeinadesiccator,andcooltoroomtemperature.Weighandrepeattheheatinginthemufflefurnacetoconstantweight.4.Calculation4.1Calculatethepercentofash(Note)asfollows:Ash,%5~R/S!3100(1)where:R=residue,g,andS=specimenweightused,g.NOTE1—Unlessfreecausticisfound,theashcanbeconcludedtobeessentiallysodiumchloride.5.PrecisionandBias5.1Precisionandbiaswerenotestablishedatthetimethistestmethodwaswritten.Aneffortisbeingmadetoobtaintheprecisionand,ifobtainable,itwillbepublishedinfuturerevisons.Thiste...
