BS ISO 13099-2:2012 BSl Standards Publication Colloidal systems - Methods for zetapotential determination Part 2: Optical methods bsi. ..making excellence a habit: BSISO13099-2:2012 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS0 13099-2:2012. The UK participation in its preparation was entrusted to Technical Committee LB/37, Particle characterization including sieving, A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. @ The British Standards Institution 2012 Published by BSI Standards Limited 2012 ISBN 978 0 580 70477 2 ICS 19.120 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2012. Amendments issued since publication Date Text affected BS ISO 13099-2:2012 INTERNATIONAL ISO STANDARD 13099-2 First edition 2012-06-15 Colloidal systems Methods for zeta- potential determination - Part 2: Optical methods Systemes colloidaux-Methodes dedetermination dupotentielzeta- Partie2:Methodesoptiques Reference number ISO 13099-2:2012(E) O @ISO2012 BS ISO 13099-2:2012 ISO13099-2:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @IsO2012-Allrightsreserved BSISO 13099-2:2012 ISO13099-2:2012(E) Contents Page Foreword Introduction 1 Scope. 2 Normativereferences. 3 Terms,definitions and symbols 3.1 Terms and definitions. 3.2 Symbols. 4 Principles 5 Microscopic methods 6 Electrophoretic light-scattering (ELS) method. 6.1 General 5 6.2 Cell design.... 5 6.3 Reference beam optical arrangement. 6 6.4 Cross-beam optical arrangement. 6 6.5 Signal processing 6.6 Determinationofelectrophoreticmobility 7 Calculation of zeta-potential. 9 8 Operationalprocedures 10 8.1 Requirements 10 8.2 Verification 12 8.3 Sources ofmeasurementerror. 13 8.4 Test report 15 AnnexA (informative)Electroosmosiswithin capillary cells .16 Bibliography 19 ii @ ISO 2012 -All rights reserved BSISO 13099-2:2012 ISO13099-2:2012(E) Foreword non-governmental, in liaison with isO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC)on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lE 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 Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 13099 was prepared byTechnical Committee ISO/TC24,Particle characterization including sieving, SubcommitteeSC 4,Particle characterization. potentialdetermination: Part1:Electroacousticand electrokineticphenomena 一 Part 2: Optical methods The following part is under preparation Part 3:Acousticmethods iv @ISO2012All rights reserved BSISO13099-2:2012 ISO13099-2:2012(E) Introduction Zeta-potential is a parameter that can be used to predict the long term stability of suspensions and emulsions and to study surf