Designation:D6886−18StandardTestMethodforDeterminationoftheWeightPercentIndividualVolatileOrganicCompoundsinWaterborneAir-DryCoatingsbyGasChromatography1ThisstandardisissuedunderthefixeddesignationD6886;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisforthedeterminationoftheweightpercentofindividualvolatileorganiccompoundsinwater-borneair-drycoatings(Note1).1.2Thismethodmaybeusedfortheanalysisofcoatingscontainingsilanes,siloxanes,andsilane-siloxaneblends.1.3Thismethodisnotsuitablefortheanalysisofcoatingsthatcurebychemicalreaction(thisincludestwo-componentcoatingsandcoatingswhichcurewhenheated)becausethedilutionhereinrequiredwillimpedethechemicalreactionrequiredforthesetypesofcoatings.1.4Precisionstatisticsforthismethodhavebeendeter-minedforwaterbornecoatingsinwhichthevolatileorganiccompoundweightpercentisbelow5percent.Themethodhasbeenusedsuccessfullywithhigherorganiccontentwaterbornecoatingsandwithsolventbornecoatings(Note2).1.5Thismethodmayalsobeusedtomeasuretheexemptvolatileorganiccompoundcontent(forexample,acetone,methylacetate,t-butylacetateandp-chlorobenzotrifluoride)ofwaterborneandsolvent-bornecoatings.Checklocalregula-tionsforalistofexemptcompounds.ThemethodologyisvirtuallyidenticaltothatusedinTestMethodD6133which,aswritten,isspecificforonlyexemptvolatilecompounds.1.6Volatilecompoundsthatarepresentatthe0.005weightpercentlevel(50ppm)orgreatercanbedetermined.AprocedurefordoingsoisgiveninSection9.1.7VolatileorganiccompoundcontentofacoatingcanbecalculatedusingdatafromTestMethodD6886butrequiresotherdata(seeAppendixX2.)NOTE1—DatafromthismethodwillnotalwaysprovidethevolatileorganiccompoundcontentofapaintfilmequivalenttoEPAMethod24.Somecompoundsandsomesemi-volatilecompoundsmaybeconsideredvolatileusingtheGCconditionsspecifiedbutwill...
