EPA Method 24A

1195METHOD24A-DETERMINATIONOFVOLATILEMATTERCONTENTANDDENSITYOFPUBLICATIONROTOGRAVUREINKSANDRELATEDPUBLICATIONROTOGRAVURECOATINGS1.0ScopeandApplication.1.1Analytes.AnalyteCASNo.Volatileorganiccompounds(VOC)NoCASnumberassigned1.2Applicability.ThismethodisapplicableforthedeterminationoftheVOCcontentanddensityofsolvent-borne(solvent-reducible)publicationrotogravureinksandrelatedpublicationrotogravurecoatings.2.0SummaryofMethod.2.1SeparateproceduresareusedtodeterminetheVOCweightfractionanddensityoftheinkorrelatedcoatingandthedensityofthesolventintheinkorrelatedcoating.TheVOCweightfractionisdeterminedbymeasuringtheweightlossofaknownsamplequantitywhichhasbeenheatedforaspecifiedlengthoftimeataspecifiedtemperature.Thedensityofboththeinkorrelatedcoatingandsolventaremeasuredbyastandardprocedure.Fromthisinformation,theVOCvolumefractioniscalculated.3.0Definitions.[Reserved]4.0Interferences.[Reserved]5.0Safety.11965.1Disclaimer.Thismethodmayinvolvehazardousmaterials,operations,andequipment.Thistestmethoddoesnotpurporttoaddressallofthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthistestmethodtoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortoperformingthistestmethod.5.2HazardousComponents.Someofthecompoundsthatmaybecontainedintheinksorrelatedcoatingsanalyzedbythismethodmaybeirritatingorcorrosivetotissuesormaybetoxic.Nearlyallarefirehazards.Appropriateprecautionscanbefoundinreferencedocuments,suchasReference6ofSection16.0.6.0EquipmentandSupplies.Thefollowingequipmentandsuppliesarerequiredforsampleanalysis:6.1WeighingDishes.Aluminumfoil,58mm(2.3in.)indiameterby18mm(0.7in.)high,withaflatbottom.Theremustbeatleastthreeweighingdishespersample.6.2DisposableSyringe.5ml.6.3AnalyticalBalance.Tomeasuretowithin0.1mg.6.4Oven.Vacuumovencapableofmaintainingatemperatureof120±2EC(248±4EF)andanabsolutepressureof510±51mmHg(20±2in.Hg)for4hours.1197Alternatively,aforceddraftovencapableofmaintainingatemperatureof120±2EC(248±4EF)for24hours.6.5TheequipmentandsuppliesspecifiedinASTMD1475-60,80,or90(incorporatedbyreference-see§60.17).7.0ReagentsandStandards.7.1ThereagentsandstandardsspecifiedinASTMD1475-60,80,or90arerequired.8.0SampleCollection,Preservation,Storage,andTransport.8.1Followthesamplecollection,preservation,storage,andtransportproceduresdescribedinReference4ofSection16.0.9.0QualityControl.[Reserved]10.0CalibrationandStandardization.[Reserved]11.0AnalyticalProcedure.AdditionalguidancecanbefoundinReference5ofSection16.0.11.1VOCWeightFraction.Shakeormixtheinkorrelatedcoatingsamplethoroughlytoassurethatallthesolidsarecompletelysuspended.Labelandweightothenearest0.1mgaweighingdishandrecordthisweight(Mx1).Usinga5mlsyringe,withoutaneedle,extractanaliquotfromtheinkorrelatedcoatingsample.Weighthesyringeandaliquottothenearest0.1mgandrecordthisweight(Mcy1).Transfer1to3gofthealiquottothetared1198weighingdish.Reweighthesyringeandremainingaliquottothenearest0.1mgandrecordthisweight(Mcy2).Heattheweighingdishwiththetransferredaliquotinavacuumovenatanabsolutepressureof510±51mmHg(20±2in.Hg)andatemperatureof120±2EC(248±4EF)for4hours.Alternatively,heattheweighingdishwiththetransferredaliquotinaforceddraftovenatatemperatureof120±2ECfor24hours.Aftertheweighingdishhascooled,reweighittothenearest0.1mgandrecordtheweight(Mx2).Repeatthisproceduretwotimesforeachinkorrelatedcoatingsample,foratotalofthreesamples.11.2InkorRelatedCoatingDensity.Determinethedensityoftheinkorrelatedcoating(Dc)accordingtotheprocedureoutlinedinASTMD1475.Makeatotalofthreedeterminationsforeachinkorrelatedcoatingsample.Reporttheinkorrelatedcoatingdensityasthearithmeticaverage(¯Dc)ofthethreedeterminations.11.3SolventDensity.Determinethedensityofthesolvent(Do)accordingtotheprocedureoutlinedinASTMD1475.Makeatotalofthreedeterminationsforeachinkorrelatedcoatingsample.Reportthesolventdensityasthearithmeticaverage(¯Do)ofthethreedeterminations.12.0CalculationsandDataAnalysis.1199Wo'Mx1%Mcy1&Mcy2&Mx2Mcy1&Mcy2Eq.24A-1Vo'¯Wo¯Dc¯DoEq.24A-212.1VOCWeightFraction.Foreachdetermination,calculatethevolatileorganiccontentweightfraction(Wo)usingthefollowingequation:Makeatotalofthreedeterminations.ReporttheVOCweightfractionasthearithmeticaverage(¯Wo)ofthethreedeterminations.12.2VOCVolumeFraction.Calculatethevolumefractionvolatileorganiccontent(Vo)usingthefollowingequation:13.0MethodPerformance.[Reserved]14.0PollutionPrevention.[Reserved]15.0WasteManagement.[Reserved]16.0References.1.StandardTestMethodforDensityofPaint,Varnish,Lacquer,andRelatedProducts.ASTMDesignationD1475.12002.Teleconversation.Wright,Chuck,InmontCorporationwithReich,R.,A.,RadianCorporation.September25,1979,GravureInkAnalysis.3.Teleconversation.Oppenheimer,Robert,GravureResearchInstitutewithBurt,Rick,RadianCorporation,November5,1979,GravureInkAnalysis.4.StandardProcedureforCollectionofCoatingandInkSamplesforAnalysisbyReferenceMethods24and24A.EPA-340/1-91-010.U.S.EnvironmentalProtectionAgency,StationarySourceComplianceDivision,Washington,D.C.September1991.5.StandardOp