ISO 19396-2 2025.docx

ISOInternationalStandardISO19396-2Secondedition2025-06Paintsandvarnishes一DeterminationofpHvalue一Part2:pHsensorswithISFETtechnologyPeinturesetvernisDeterminationdeIavaleurdepHPartie2:SondesdepHdoteesdeIatechnologieISFETReferencenumberISO19396-2:2025(en)COPYRIGHTPROTECTEDDOCUMENT©ISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+41227490111Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageForewordivIntroductionv1 Scope12 Normativereferences13 Termsanddefinitions14 Principle45 Apparatusandmaterials45.1 pHmeasuringapparatus45.2 pHmeter45.3 ISFETsensor55.4 Buffersolutions66 Sampling67 Procedure77.1 Testconditions77.2 Calibration77.3 Numberofdeterminations77.4 MeasuringthepHvalue78 Evaluation79 Precision89.1 General89.2 Repeatabilitylimit,r89.3 Reproducibilitylimit,R810 Testreport8AnnexA(informative)Determinationofprecision9Bibliography11ForewordISO(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,SubcommitteeSC9,Generaltestmethodsforpaintsandvarnishes,incollaborationwiththeEuropeanCommitteeforStandardization(CEN)TechnicalCommitteeCEN/TC139,Paintsandvarnishes,inaccordancewiththeAgreementontechnicalcooperationbetweenISOandCEN(ViennaAgreement).Thissecondeditioncancelsandreplacesthefirstedition(ISO19396-2:2017),whichhasbeentechnicallyrevised.Themainchangesareasfollows: definitionsforntheoreticalslope"and""stabilityofmeasuredvalue“havebeendeleted; theterm,ISFETelectrode11hasbeenchangedtor,ISFETsensor"intheentiretextincludingthetitleofthedocument; thecalibrationf7.2hasbeenclarified; thenormativereferenceshavebeenupdated.AlistofallpartsintheISO19396seriescanbefoundontheISOwebsite.Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheuser'snationalstandardsbody.AcompletelistingofthesebodiescanbefoundatWWW.iso.org/membnrs.htmLIntroductionThepHvalueofaqueousproductsisofdecisiveimportancefortheproductpropertiesanddurability.ISO19396-1specifiesamethodformeasuringthepHvalueusingpHsensorswithaglassmembrane.ThisdocumentcoversamethodformeasuringthepHvalueofdispersionsandcoatingmaterialsusingpHsensorswithion-sensitivefield-effecttransistor(ISFET)technology.PaintsandvarnishesDeterminationofpHvalue一Part2:pHsensorswithISFETtechnology1 ScopeThisdocumentspecifiesamethodformeasuringthepHvalueofdispersionsandcoatingmaterialsusingpHsensorswithion-sensitivefield-effecttransistor(ISFET)technology.2 NormativereferencesThefollowingdocumentsarereferredtointhetextinsuchawaythatsomeoralloftheircontentconstitutesrequirementsofthisdocument.Fordatedreferences,onlytheeditioncitedapplies.Forundatedreferences,thelatesteditionofthereferenceddocument(includinganyam