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1、ENISO23649February2025EuropeanstandardNormeeuropeenneEuropaischenormICS59.140.30EnglishVersionChemicalsfortheleathertanningindustry-DeterminationofcyclosiloxanesISO23649:2025ProduitschimiquespourFindustriedutannageducuir-DeterminationdesCyclosiloxan(ISO23649:2025)ChemikalienfiirdieLedergerbereiindus
2、trie-BestimmungvonCyclosiloxaneninImpragnierfettungsmitteln(ISO23649:2025)ThisEuropeanStandardwasapprovedbyCENon24February2025.CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEuropeanStandardthestatusofanationalstandardwithoutanyalteration.Up-to
3、-datelistsandbibliographicalreferencesconcerningsuchnationalstandardsmaybeobtainedonapplicationtotheCEN-CENELECManagementCentreortoanyCENmember.ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).AversioninanyotherlanguagemadebytranslationundertheresponsibilityofaCENmemberintoit
4、sownlanguageandnotifiedtotheCEN-CENELECManagementCentrehasthesamestatusastheofficialversions.CENmembersarethenationalstandardsbodiesofAustria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Ne
5、therlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TiirkiyeandUnitedKingdom.EUROPEANCOMMITTEEFORSTANDARDIZATIONCOMITEEUROPEENDENORMALISATIONEuropaischeskomiteefurnormungCEN-CENELECManagementCentre:RuedelaScience23,B-1040Brussels2025CEN
6、AllrightsofexploitationinanyformandbyanymeansreservedRef.No.ENISO23649:2025EworldwideforCENnationalMembers.ContentsPageEuropeanforeword3EuropeanforewordThisdocument(ENISO23649:2025)hasbeenpreparedbyTechnicalCommitteeISO/IULTCSInternationalUnionofLeatherTechnologistsandChemistsSocietiesincollaboratio
7、nwithTechnicalCommitteeCEN/TC289LeatherthesecretariatofwhichisheldbyUNLThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextorbyendorsement,atthelatestbyAugust2025,andconflictingnationalstandardsshallbewithdrawnatthelatestbyAugust2025.Attentionisdrawntothe
8、possibilitythatsomeoftheelementsofthisdocumentmaybethesubjectofpatentrights.CENshallnotbeheldresponsibleforidentifyinganyorallsuchpatentrights.Anyfeedbackandquestionsonthisdocumentshouldbedirectedtotheusersnationalstandardsbody/nationalcommittee.AcompletelistingofthesebodiescanbefoundontheCENwebsite
9、.AccordingtotheCEN-CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Bulgaria,Croatia,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,
10、Malta,Netherlands,Norway,Poland,Portugal,RepublicofNorthMacedonia,Romania,Serbia,Slovakia,Slovenia,Spain,Sweden,Switzerland,TiirkiyeandtheUnitedKingdom.EndorsementnoticeThetextofISO23649:2025hasbeenapprovedbyCENasENISO23649:2025withoutanymodification.InternationalStandardISO23649IULTCSIUC444Firstedi
11、tion2025-02ChemicalsfortheleathertanningindustryDeterminationofcyclosiloxanesProduitschimiquespourHndustriedutannageducuirDeterminationdescyclosiloxanesReferencenumbersISO23649:2025(en)IULTCS/IUC444:2025(en)COPYRIGHTPROTECTEDDOCUMENTISO2025Allrightsreserved.Unlessotherwisespecified,orrequiredintheco
12、ntextofitsimplementation,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwrittenpermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO,smemberbodyinthecountryoft
13、herequester.ISOcopyrightofficeCP401Ch.deBlandonnet8CH-1214Vernier,GenevaPhone:+4122749Ol11Email:copyrightiso.orgWebsite:www.iso.orgPublishedinSwitzerlandContentsPageForewordivIntroductionv1 Scope12 Normativereferences13 Termsanddefinitions14 Principle15 Apparatus16 Reagents27 Samplingandsampleprepar
14、ation38 Procedure38.1 Samplesolutionpreparation38.2 Liquid-liquidextraction38.3 Instrumentalanalysis49 Expressionofresults410 Precision411 Testreport4Annex A (informative)ChromatographicanalysisoperatingparametersforGC-MS6Annex B (informative)Precision:reliabilityofthemethod7Annex C (normative)Sampl
15、epreparationfornon-water-solublechemicals8Bibliography9ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eachmemberbodyinterestedinasubj
16、ectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmentabinliaisonwithISO1alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.
