BS ISO 9276-2:2014 BSl Standards Publication Representation of results of particle size analysis Part 2: Calculation of average particle sizes/ diameters and moments from particle size distributions bsi. ..making excellence a habit BS ISO 9276-2:2014 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS0 9276-2:2014. It supersedes BS ISO 9276-2:2001 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee LBl/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 2014.Published by BSI Standards Limited 2014 ISBN9780580803666 ICS 19.120 Compliancewitha BritishStandard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2014. Amendments issued since publication Date Text affected BS ISO 9276-2:2014 ISO INTERNATIONAL STANDARD 9276-2 Second edition 2014-05-15 Representation of results of particle size analysis - Part 2: Calculation of average particle sizes/ diameters and moments from particle size distributions Représentationdedonneesobtenuesparanalysegranulometrique- Partie 2: Calculdes tailles/diametres moyens des particules etdes moments d partirde distributionsgranulometriques Reference number IS0 9276-2:2014(E) O @ ISO 2014 BSISO 9276-2:2014 IS0 9276-2:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ISO 2014 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 ii ISO 2014-Allrights reserved BS ISO 9276-2:2014 IS0 9276-2:2014(E) Contents Page Foreword iv Introduction V 1 Scope .1 2 Normativereferences .1 3 Definitions,symbolsandabbreviatedterms .1 4 Themoment-notation. .3 4.1 Definition ofmoments accordingto themoment-notation .3 4.2 Definition of mean particle sizes accordingtothe moment-notation. .4 4.3 Calculation of moments and mean particle sizes from a given size distribution 7 4.4 Variance and standard deviation of a particle size distribution. .9 4.5 Calculationofmomentsandmeanparticlesizesfromalognormaldistribution .9 4.6 Calculation of volume specific surface area and the Sauter mean diameter .10 5 Themoment-ratio-notation .10 5.1 Definition of moments accordingtothemoment-ratio-notation .10 5.2 .11 Definitionofmeanparticlesizesaccordingtothemoment-ratio-notation 5.3 Calculation of mean particle sizesfrom a given size distribution 13 5.4 Variance and standard deviation of a particle size distribution .14 5.5 Relationshipsbetweenmeanparticlesizes. .15 5.6 Calculation of volume specific surface area and the Sauter mean diameter .16 6 Relationship between moment-notation and moment-ratio-notation .16 7 Accuracy of calculated particle size distribution parameters .18 Annex A (informative) Numerical example for calculation of mean particle sizes and standard deviation fromahistogramofavolumebased size distribution .19 Annex B (informative) Numerical example for calculation of mean particle sizes and standard deviation from a histogram of a volumebased size distribution .22 Annex C (informative) Accuracy of calculated particle size distribution parameters .25 Bibliography .27 @ IS0 2014 - All rights reserved iii BS ISO 9276-2:2014 IS0 9276-2:2014(E) Foreword Iso (the International Organization