BS ISO 18852:2015 BSl Standards Publication Rubber compounding ingredients Determination of multipoint nitrogen surface area (NSA) and statistical thickness surface area (STSA) bsi. ..making excellence a habit. BS ISO 18852:2015 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS0 18852:2015.It supersedes BS ISO 18852:2012 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/5o, Rubber - Raw, natural and synthetic, including latex and carbon black. 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 2015. Published by BSI Standards Limited 2015 ISBN9780580864728 ICS 83.040.20 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Amendments issued sincepublication Date Text affected BS ISO 18852:2015 ISO INTERNATIONAL STANDARD 18852 Third edition 2015-06-01 Rubber compounding ingredients - Determination of multipoint nitrogen surface area (NSA) and statistical thickness surface area (STSA) Ingredientsdemelangeducaoutchouc-Déterminationde la surface paradsorption d'azote (NSA)et de la surface par épaisseur statistique (STSA)parméthodemultipoints Reference number IS0 18852:2015(E) ISO @ISO2015 BSISO18852:2015 IS018852:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS02015 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,or posting on the internet or an intranet, without prior written permission. Permission can be requested 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 i ISO2015-Allrights reserved BSISO18852:2015 IS0 18852:2015(E) Contents Page Foreword ..iv 1 Scope ..1 2 Normative references 3 Principle 4 Apparatus 5 Reagents. 6 Preparation of automatic volumetric adsorption measurement apparatus .3 ..3 7 Samplepreparation 7.1 General .3 7.2 Vacuum suction method .3 7.3 Purge gas flow method. .4 8 Measurementprocedure. .5 8.1 5 Measurement 8.2 Selection of data points and determination of nitrogen surface area (NSA) 5 8.2.1 General. .5 8.2.2 Procedure A .5 8.2.3 Procedure B .6 8.3 Verificationofmeasuredvalues .6 6 Determination of statistical thickness surface area (STSA) .6 9.1 General ..6 9.2 Procedure. .7 9.3 Calculation of STSA ..7 9.4 Verificationofmeasuredvalues .7 10 Precision 11 Test report ..7 AnnexA (informative)Precision. ..8 Bibliography .10 IS0 2015-All rights reserved ili BSISO18852:2015 IS018852:2015(E) Foreword Iso (the International Organization for Standardization) isa worldwidefederation of national standards bodies (iso member bodies).The work of preparing International Standards is normally carried out through Iso technical committees.Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and 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. The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEc Directives, Part 1.In particular the different approval criteria needed for the different types of Iso documents should be noted.This document was drafted in accordance with the editorial rules of the ISo/IEC Directives, Part 2 (seewww.iso.org/