EUROPEANSTANDARD EN IS0 1833-21 NORMEEUROPEENNE EUROPAISCHE NORM May2019 ICS59.060.01 English Version Textiles( Quantitative chemical analysis Part 21: Mixtures of chlorofibres,certain modacrylics,certain elastanes, acetates,triacetates with certain other fibres (methodusingcyclohexanone)(Is01833-21:2019) Textiles-Analyse chimiquequantitative- Textilien-Quantitative chemische Analysen Partie 21: Melanges de chlorofibres, certains Teil 21: Mischungen aus Chlorfasern, modacryliques,certains elasthannes,acetates, bestimmten Modacrylfasern,bestimmten triacétates avec certaines autres fibres (méthode Elastanfasern,Acetatfasern,Triacetatfasern alacyclohexanone) (IS01833-21:2019) mit bestimmten anderen Fasern (Cyclohexanon- Verfahren)(IS01833-21:2019) This European Standard was approved by CEN on 11 May 2019. this European Standard the status of a national standard without any alteration.Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre orto any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language Management Centrehasthesame status asthe official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden Switzerland, Turkey and United Kingdom cen EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels 2019CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1833-21:2019: E worldwide for CEN national Members European foreword This document(ENIS01833-21:2019)hasbeenpreparedbyTechnicalCommitteeIS0/TC38"Textiles' in collaborationwith Technical Committee CEN/TC 248"Textiles andtextile products"the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement,at the latest by November 2o19, and conflicting national standards shallbewithdrawnatthelatestbyNovember2019. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsiblefor identifying any or all such patent rights. This document supersedes ENIS01833-21:2010. This document hasbeen prepared under a mandategiven to CEN by the European Commission and the EuropeanFreeTradeAssociation. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the followingcountriesare boundto implementthis European Standard:Austria, Belgium,Bulgaria, Croatia Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of IS01833-21:2019hasbeenapprovedby CENasENIS01833-21:2019without any modification. ii Contents Page Foreword iv 1 Scope .1 2 Normativereferences. .1 3 Termsand definitions .1 4 Principle. .1 5 Reagents. .2 6 Apparatus. .2 7 Procedure .2 8 Calculation and expression of results .3 9 Precision .3 Annex A (informative) Hot extraction apparatus .4 Bibliography 5 @ IS0 2019 - All rights reserved iii