Designation:D6902−04(Reapproved2017)StandardTestMethodforLaboratoryMeasurementofFormaldehydeEvolvedDuringtheCuringofMelamine-Formaldehyde-BasedCoatings1ThisstandardisissuedunderthefixeddesignationD6902;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodisforthedeterminationofformalde-hydeevolvedfrommelamine-formaldehyde-basedcoatingsduringthecurestep.Theresultsmaybeusedtodeterminethe“cureformaldehyde”evolvedfromasampleundercontrolledlaboratoryconditions.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thistestmethodiscapableofmeasuringfrom500µg/gto22000µgformaldehyde/gdrycoatingunderthetestconditionsspecified(3000ml/mintotalflow,50ml/minDNPHtubeflow).TheratiooftotalflowtoDNPHtubeflowcouldbeadjustedtoextendtherangeofthemethod.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.5Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D362SpecificationforIndustrialGradeToluene(Withdrawn1989)3D1979TestMethodforFreeFormaldehydeContentofAminoResins(Withdrawn2006)3D6191TestMethodforMeasurementofEvolvedFormalde-hydefromWaterReducibleAir-DryCoatingsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1cureformaldehyde,n—theformald...
