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1、InternationalStandardISO23649IULTCSIUC444Firstedition2025-02ChemicalsfortheleathertanningindustryDeterminationofcyclosiloxanesProduitschimiquespourindustriedutannageducuir一DeterminationdescyclosiloxanesReferencenumbersISO23649:2025(en)IULTCS/IUC444:2025(en)COPYRIGHTPROTECTEDDOCUMENTISO2025Allrightsr
2、eserved.Unlessotherwisespecified,orrequiredinthecontextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherIS
3、OattheaddressbeloworISO,smemberbodyinthecountryoftherequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+4122749Ol11Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageForewordivIntroductionv1 Scope12 Normativereferences13 Termsanddefinitions14 Principl
4、e15 Apparatus16 Reagents27 Samplingandsamplepreparation38 Procedure38.1 Samplesolutionpreparation38.2 Liquid-liquidextraction38.3 Instrumentalanalysis49 Expressionofresults410 Precision411 Testreport4Annex A (informative)ChromatographicanalysisoperatingparametersforGC-MS6Annex B (informative)Precisi
5、on:reliabilityofthemethod7Annex C (normative)Samplepreparationfornon-water-solublechemicals8Bibliography9ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOt
6、echnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmentatinliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommi
7、ssion(IEC)onallmattersofelectrotechnicalstandardization.TheproceduresusedtodevelopthisdocumentandthoseintendedforitsfurthermaintenancearedescribedintheISO/IECDirectives,Part1.Inparticular,thedifferentapprovalcriterianeededforthedifferenttypesofISOdocumentsshouldbenoted.Thisdocumentwasdraftedinaccord
8、ancewiththeeditorialrulesoftheISO/IECDirectives,Part2(seeWWW.iso.org/directives).ISOdrawsattentiontothepossibilitythattheimplementationofthisdocumentmayinvolvetheuseof（八）patent(三).ISOtakesnopositionconcerningtheevidence,validityorapplicabilityofanyclaimedpatentrightsinrespectthereof.Asofthedateofpub
9、licationofthisdocument,ISOhadnotreceivednoticeof（八）patent(三)whichmayberequiredtoimplementthisdocument.However,implementersarecautionedthatthismaynotrepresentthelatestinformation,whichmaybeobtainedfromthepatentdatabaseavailableatWWW.iso.org/patents.ISOshallnotbeheldresponsibleforidentifyinganyorallsu
10、chpatentrights.Anytradenameusedinthisdocumentisinformationgivenfortheconvenienceofusersanddoesnotconstituteanendorsement.Foranexplanationofthevoluntarynatureofstandards,themeaningofISOspecifictermsandexpressionsrelatedtoconformityassessment,aswellasinformationaboutISO,sadherencetotheWorldTradeOrgani
11、zation(WTO)principlesintheTechnicalBarrierstoTrade(TBT),seeWWW.iso.org/iso/foreword.htmLIULTCS1originallyformedin1897,isaworld-wideorganizationofprofessionalleathersocietiestofurthertheadvancementofleatherscienceandtechnology.IULTCShasthreeCommissions,whichareresponsibleforestablishinginternationalm
12、ethodsforthesamplingandtestingofleather.ISOrecognizesIULTCSasaninternationalstandardizingbodyforthepreparationoftestmethodsforleather.ThisdocumentwaspreparedbytheChemicalTestCommissionoftheInternationalUnionofLeatherTechnologistsandChemistsSocieties(IUCCommission,IULTCS),incollaborationwiththeEurope
13、anCommitteeforStandardization(CEN)TechnicalCommitteeCEN/TC289,Leather,inaccordancewiththeAgreementontechnicalcooperationbetweenISOandCEN(ViennaAgreement).Anyfeedbackorquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody.AcompletelistingofthesebodiescanbefoundatWWW.iso.org/members.h
14、tml.IntroductionThisdocumentincludesaprocedureforanalysingcertaincyclosiloxanesusinggaschromatography(GC)withmassspectrometer(MS)equipment.WiththisanalyticalmethodOctamethylcyclotetrasiloxane(D4),decamethylcyclopentasiloxane(D5)anddodecamethylcyclohexasiloxane(D6)canbedetermined.Intheleatherindustry
15、cyclosiloxanes(D4),(D5and(D6)areusedinthemanufactureofsilicone-basedwaterproofingfatliquorsandcanalsobeusedintheproductionofsilicone-basedfinishingchemicalsespeciallyashandlemodifiers.Atpresent,theofficialclassificationrecognisedintheEUisthefollowing. Octamethylcyclotetrasiloxane(D4isclassifiedasper
16、sistent,bioaccumulativeandtoxic.t1l Decamethylcyclopentasiloxane(D5)isclassifiedaspersistent,bioaccumulativeandtoxic.H Dodecamethylcyclohexasiloxane(D6)isclassifiedaspersistent,bioaccumulativeandtoxic.BlInternationalStandardIS023649:2025(en)IULTCSIUC202S(en)ChemicalsfortheleathertanningindustryDeterminationofcy
