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1、ISOInternationalStandardISO7012-2Firstedition2025-03Paintsandvarnishes一Determinationofpreservativesinwater-dilutablecoatingmaterials一Part2:Determinationofin-cantotalformaldehydePeinturesetvernisDosagedesagentsdepreservationdanslesproduitsdepeinturediluablesaYeau一Partie2:Dosageduformaldehydetotalenpo
2、tReferencenumberISO7012-2:2025(en)ISO2025COPYRIGHTPROTECTEDDOCUMENTISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheint
3、ernetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageF
4、orewordiv1 Scope12 Normativereferences13 Termsanddefinitions14 Principle34.1 General34.2 Acidicwater-steam-distillation34.3 Derivatizationwithchromotropicacid35 Apparatus36 Reagentsandmaterials46.1 General46.2 Generalreagents46.3 ReagentsforderivatizationwithCHRA46.4 Reagentsfortitrationofformaldehy
5、destandard47 Procedure57.1 Sampling57.2 Distillation.57.3 DerivatizationusingtheCHRAprocedure57.4 Calibration57.5 Analysis57.5.1 Analysisofthecalibrationsolution57.5.2 Samplemeasurement67.6 Calculationofin-cantotalformaldehydecontent68 Precision78.1 General78.2 Repeatabilitylimit,r.78.3 Reproducibil
6、itylimit,R.79 Testreport8Annex A (normative)Titrationmethodsforthedeterminationofformaldehydecontent9Annex B (informative)Resultsoftheinterlaboratorytest11Bibliography12ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).Thework
7、ofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthewor
8、k.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthediffere
9、nttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(seeWWW.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityorapplic
10、abilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.HoweverlImplementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatWWW.iso.
11、org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformityassess
12、ment,aswellasinformationaboutISOsadherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT),seeWWW.iso.org/iso/foreword.htmLThisdocumentwaspreparedbyTechnicalCommitteeISO/TC35,Paintsandvarnishes,SubcommitteeSC16,Chemicalanalysis,incollaborationwiththeEuropeanCommitteeforSt
13、andardization(CEN)TechnicalCommitteeCEN/TC139,Paintsandvarnishes,inaccordancewiththeAgreementontechnicalcooperationbetweenISOandCEN(ViennaAgreement).AlistofallpartsintheISO7012seriescanbefoundontheISOwebsite.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody.Acomplet
14、elistingofthesebodiescanbefoundatwww.iso.orH/members.htmLPaintsandvarnishesDeterminationofpreservativesinwater-dilutablecoatingmaterials一Part2:Determinationofin-cantotalformaldehyde1 ScopeThisdocumentspecifiestheapparatusandtheanalyticalmethodsfordeterminingthein-cantotalformaldehydecontentinwater-d
15、ilutablecoatingmaterials,wherethemainsourcesofformaldehydeareincanpreservatives.Thisdocumentisalsoapplicabletopolymerdispersions.2 NormativereferencesThefollowingdocumentsarereferredtointhetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.ISO1513,PaintsandvarnishesExaminationandpreparationOftestsampIesISO3696,Waterforanalyticallaborato
