EN ISO 1833-25 EUROPEANSTANDARD NORMEEUROPEENNE EUROPAISCHE NORM July2020 ICS59.060.01 SupersedesENIS01833-25:2013 EnglishVersion Textiles - Quantitative chemical analysis - Part 25: Mixtures of polyester with certain other fibres (method using trichloroacetic acid and chloroform) (iso 1833-25:2020) Textiles- Analyse chimique quantitative -Partie Textilien-Quantitative chemische Analysen 25: Mélanges de polyesteravec certaines autres - Teil 25: Mischungen aus Polyester mit fibres (méthode a I'acide trichloracetique bestimmten anderen Fasern (Trichloressigsaure-/ et au chloroforme) (Is0 1833-25:2020) Chloroform-Verfahren) (IS0 1833-25:2020) This European Standard was approved by CEN on 27 April 2020. 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 ortoany CENmember. This European Standard exists in three official versions (English, French, German). A version in any otherlanguage made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the 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 2020CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1833-25:2020: E worldwide for CEN national Members European foreword This document (ENIS01833-25:2020)hasbeen prepared byTechnicalCommitteeIS0/TC38"Textiles" in collaboration with Technical Committee CEN/TC 248"Textiles and textile products"the secretariat ofwhichisheldbyBSI This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, atthelatest by January 2021,and conflicting national standards shall bewithdrawn atthelatest by January2021. 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 responsible for identifying any or all such patent rights. This documentsupersedes EN IS0 1833-25:2013. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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 the United Kingdom. Endorsementnotice The text of ISO 1833-25:2020 has been approved by CEN as EN IS0 1833-25:2020 without any modification. i Contents Page Foreword ..iv Introduction. .. 1 Scope. ..1 2 Normativereferences 3 Termsanddefinitions 4 Principle ..1 5 Reagents ..1 5.2 Solution of 15 g of trichloroacetic acid filled up to 100 g with chloroform. .2 5.3 Chloroform. 6 Apparatus .2 2 7 Testprocedure 8 Calculationandexpressionofresults .2 9 Precision ..2 Bibliography .3 @IS0 2020 -All rights reserved ili