Designation:D1958–86(Reapproved1995)e1StandardTestMethodforChloroformInsolubleMatterinOiticicaOil1ThisstandardisissuedunderthefixeddesignationD1958;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.e1NOTE—KeywordswereaddededitoriallyinMay1995.1.Scope1.1Thistestmethodcoversthedeterminationofthematterinoiticicaoilthatisinsolubleinchloroform.Itmayalsobeusedforotherdryingoils.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityofwhoeverusesthisstandardtoconsultandestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.AspecifichazardstatementisgiveninSection4.2.SignificanceandUse2.1Mineralcontaminationinoiticicaorotherdryingoilsisinsolubleinchloroformwhilethenaturalcomponentsoftheoilaresoluble.Thistestmethodprovidesameanstodeterminethedegreeofcontaminationbymineralmatter.3.Reagent3.1Chloroform(CHCl3)(Precaution—See4.1).4.Hazards4.1Chloroformisahazardousliquidthatcanbeabsorbedthroughtheskin.Itsvaporishazardousthroughinhalation.Itisanarcotic.Useonlywithadequateventilation(inahood).Forfurtherinformation,seesupplier’sMaterialSafetyDataSheet.5.Procedure5.1Dissolve10gofthesampleinsufficientchloroformtoobtainafluidsolution.FilterthroughadriedandweighedGoochcrucible,washwithchloroformuntiltheoilisremoved.Heatthecrucibleandresidue,ifpresent,at10562°C,cool,andweigh.Repeattheheatingandweighinguntiltheweightisconstantto0.1mg.6.Calculation6.1Calculatethepercentofinsolublematter,I,inchloro-formasfollows:I5~R/S!3100where:R5residue,g,andS5sampleused,g.7.PrecisionandBias7.1Precisionandbiasdatawerenotestablishedatthetimethistestmethodwaswritten.Aneffortisbeingmadetoobtaintheprecisionand,ifobtainable,willbepublishedinfuturerevisions.Thistestmethodhasbeeninuseformanyyears,a...
