EUROPEANSTANDARD EN ISO 2870 NORMEEUROPEENNE EUROPAISCHENORM February 2009 ICS 71.100.40 Supersedes EN ISO 2870:1994 English Version Surface active agents - Detergents - Determination of anionic- active matter hydrolysable and non-hydrolysable under acid conditions (IsO 2870:2009) Agents de surface - Detergents - Determination de la Grenzflachenaktive Stoffe - Waschmittel - Bestimmung von matiere active anionique hydrolysable et non hydrolysable en milieu acide (ISO 2870:2009) anionaktiven Anteilen (ISO 2870:2009) This European Standard was approved by CEN on 28 January 2009 CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national This European Standard exists in three official versions (English, French, German). A version in any other language made by translation official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG ManagementCentre:AvenueMarnix17,B-100oBrussels All rights of exploitation in any form and by any means reserved @2009CEN Ref. No. EN ISO 2870:2009: E worldwide for CEN national Members. ENISO2870:2009 (E) Foreword This document (EN ISO2870:2009)hasbeenprepared by Technical CommitteeCEN/TC 276"Surface active agents, the secretariat of which is held by AFNOR, in collaboration with Technical Committee ISO/TC 91 "Surfaceactiveagents". This European Standard shall be given the status of a national standard, either by publication of an identical the latest by August2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent This document supersedes ENISO2870:1994. 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, Cyprus, Czech Lithuania, Luxembourg, Malta, Netherlands, Norway,Poland, Portugal, Romania, Slovakia, Slovenia, Spain Sweden, Switzerland and the United Kingdom. ISO 2870:2009(E) Contents Page Foreword iv 1 Scope. 2 Normativereferences 3 Principle.. 4 Reagents. 5 Apparatus 6 Sampling.. 7 Procedure... 7.1 Testportionandtestsolution.. 7.2 Determination oftotalanionic-active matter 7.3 Determination of hydrolyzable anionic-active matter.. 8 Calculation andexpressionof results.... 8.1 Calculations.. 8.2 Precision... 9 Testreport Bibliography @ ISO 2009 -All rights reserved ili ISO 2870:2009(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standardrequires approval by at least 75%of the memberbodies casting avote. rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO2870 was prepared bythe European Committee for Standardization (CEN)Technical Committee Agreement), This third edition cancels and replaces the second edition (iSO 2870:1986) which has been technically revised The following major change was introduced: introduction of the potentiometric two-phase titration. iv Iso2009-All rights reserved INTERNATIONAL STANDARD ISO2870:2009(E) Surface active agents Detergents Determina