ISO 7012-2 2025.docx

ISOInternationalStandardISO7012-2Firstedition2025-03Paintsandvarnishes一Determinationofpreservativesinwater-dilutablecoatingmaterials一Part2:Determinationofin-cantotalformaldehydePeinturesetvernisDosagedesagentsdepreservationdanslesproduitsdepeinturediluablesaYeau一Partie2:DosageduformaldehydetotalenpotReferencenumberISO7012-2:2025(en)ISO2025COPYRIGHTPROTECTEDDOCUMENT©ISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageForewordiv1 Scope12 Normativereferences13 Termsanddefinitions14 Principle34.1 General34.2 Acidicwater-steam-distillation34.3 Derivatizationwithchromotropicacid35 Apparatus36 Reagentsandmaterials46.1 General46.2 Generalreagents46.3 ReagentsforderivatizationwithCHRA46.4 Reagentsfortitrationofformaldehydestandard47 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 Reproducibilitylimit,R.79 Testreport8Annex A (normative)Titrationmethodsforthedeterminationofformaldehydecontent9Annex B (informative)Resultsoftheinterlaboratorytest11Bibliography12ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthedifferenttypesofISOdocumentshouldbenoted.ThisdocumentwasdraftedinaccordancewiththeeditorialrulesoftheISO/IECDirectives,Part2(seeWWW.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpublicationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.HoweverlImplementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatWWW.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformityassessment,aswellasinformationaboutISO'sadherencetotheWorldTradeOrganization(WTO)principlesintheTechnicalBarrierstoTrade(TBT),seeWWW.iso.org/iso/foreword.htmLThisdocumentwaspreparedbyTechnicalCommitteeISO/TC35,Paintsandvarnishes,SubcommitteeSC16,Chemicalanalysis,incollaborationwiththeEuropeanCommitteeforStandardization(CEN)TechnicalCommitteeCEN/TC139,Paintsandvarnishes,inaccordancewiththeAgreementontechnicalcooperationbetweenISOandCEN(ViennaAgreement).AlistofallpartsintheISO7012seriescanbefoundontheISOwebsite.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheuser'snationalstandardsbody.Acompletelistingofthesebodiescanbefoundatwww.iso.orH/members.htmLPaintsandvarnishesDeterminationofpreservativesinwater-dilutablecoatingmaterials一Part2:Determinationofin-cantotalformaldehyde1 ScopeThisdocumentspecifiestheapparatusandtheanalyticalmethodsfordeterminingthein-cantotalformaldehydecontentinwater-dilutablecoatingmaterials,wherethemainsourcesofformaldehydeareincanpreservatives.Thisdocumentisalsoapplicabletopolymerdispersions.2 NormativereferencesThefollowingdocumentsarereferredtointhetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyamendments)applies.ISO1513,PaintsandvarnishesExaminationandpreparationOftestsampIesISO3696,Waterforanalyticallaborato